ASTM D5286-01(2017)
(Test Method)Standard Test Methods for Determination of Transfer Efficiency Under General Production Conditions for Spray Application of Paints
Standard Test Methods for Determination of Transfer Efficiency Under General Production Conditions for Spray Application of Paints
SIGNIFICANCE AND USE
5.1 Subject to the limitations listed in 1.3, these test methods can be used to optimize paint application processes.
SCOPE
1.1 These test methods cover the determination of the transfer efficiency of spray-applied coatings under general plant conditions. Transfer efficiency is the ratio of paint solids deposited to the total paint solids used during the application process, expressed as a percent.
1.2 The transfer efficiency is calculated from the weight or volume of the paint solids sprayed and that of the paint solids deposited on the painted part.
1.3 Limitations include the ability to accurately determine the amount of paint solids deposited on the part and the capability of accurate measurement of the amount of paint sprayed.
1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
Note 1: These test methods apply to general plant production equipment and procedures. A method specific to automotive plants is defined in Test Method D5066.
Note 2: The relationship between volatile organic compound emission rates and transfer efficiency in automobile and light duty truck topcoat operations, EPA 450/3-88-01, referenced in Test Method D5066 does not apply to general production facilities.
Note 3: A single-point transfer efficiency measurement may not represent the entire process.
Note 4: The operator and the spray-application equipment-operating conditions during the transfer efficiency measurement should be representative of normal operating conditions.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific hazard statements see Section 7, and 10.3.1.
Note 5: These test methods have not been adopted by federal regulatory agencies for demonstration of compliance with air pollution regulations such as VOC, HAPS, etc.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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Designation: D5286 − 01 (Reapproved 2017)
Standard Test Methods for
Determination of Transfer Efficiency Under General
Production Conditions for Spray Application of Paints
This standard is issued under the fixed designation D5286; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope bility of regulatory limitations prior to use. For specific hazard
statements see Section 7, and 10.3.1.
1.1 These test methods cover the determination of the
transfer efficiency of spray-applied coatings under general
NOTE 5—These test methods have not been adopted by federal
regulatory agencies for demonstration of compliance with air pollution
plant conditions. Transfer efficiency is the ratio of paint solids
regulations such as VOC, HAPS, etc.
deposited to the total paint solids used during the application
1.6 This international standard was developed in accor-
process, expressed as a percent.
dance with internationally recognized principles on standard-
1.2 The transfer efficiency is calculated from the weight or
ization established in the Decision on Principles for the
volume of the paint solids sprayed and that of the paint solids
Development of International Standards, Guides and Recom-
deposited on the painted part.
mendations issued by the World Trade Organization Technical
1.3 Limitations include the ability to accurately determine
Barriers to Trade (TBT) Committee.
the amount of paint solids deposited on the part and the
2. Referenced Documents
capability of accurate measurement of the amount of paint
sprayed.
2.1 ASTM Standards:
D1005Test Method for Measurement of Dry-Film Thick-
1.4 The values stated in SI units are to be regarded as the
ness of Organic Coatings Using Micrometers
standard. The values given in parentheses are for information
D1186Test Methods for Nondestructive Measurement of
only.
Dry Film Thickness of Nonmagnetic CoatingsApplied to
NOTE 1—These test methods apply to general plant production equip- 3
a Ferrous Base (Withdrawn 2006)
mentandprocedures.Amethodspecifictoautomotiveplantsisdefinedin
D1200Test Method for Viscosity by Ford Viscosity Cup
Test Method D5066.
D1400TestMethodforNondestructiveMeasurementofDry
NOTE2—Therelationshipbetweenvolatileorganiccompoundemission
rates and transfer efficiency in automobile and light duty truck topcoat
Film Thickness of Nonconductive Coatings Applied to a
operations, EPA450/3-88-01, referenced in Test Method D5066 does not
Nonferrous Metal Base (Withdrawn 2006)
apply to general production facilities.
D1475Test Method For Density of Liquid Coatings, Inks,
NOTE 3—A single-point transfer efficiency measurement may not
and Related Products
represent the entire process.
NOTE 4—The operator and the spray-application equipment-operating D2369Test Method for Volatile Content of Coatings
conditionsduringthetransferefficiencymeasurementshouldberepresen-
D2697Test Method for Volume Nonvolatile Matter in Clear
tative of normal operating conditions.
or Pigmented Coatings
1.5 This standard does not purport to address all of the
D3925Practice for Sampling Liquid Paints and Related
safety concerns, if any, associated with its use. It is the
Pigmented Coatings
responsibility of the user of this standard to establish appro-
D5066Test Method for Determination of the Transfer Effi-
priate safety and health practices and determine the applica-
ciency Under Production Conditions for Spray Applica-
tion of Automotive Paints—Weight Basis
These test methods are under the jurisdiction of ASTM Committee D01 on
Paint and Related Coatings, Materials, and Applications and are the direct For referenced ASTM standards, visit the ASTM website, www.astm.org, or
responsibility of Subcommittee D01.55 on FactoryApplied Coatings on Preformed contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Products. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved June 1, 2017. Published June 2017. Originally the ASTM website.
approved in 1993. Last previous edition approved in 2011 as D5286–01(2011). The last approved version of this historical standard is referenced on
DOI: 10.1520/D5286-01R17.
www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D5286 − 01 (2017)
2.2 U.S. Government Standards: 6. Apparatus
EPA450⁄3-88-018U.S. Environmental Protection Agency
6.1 Laboratory Scale, accurate to 60.001 g.
Protocol for Determining the Daily Volatile Organic
6.2 Tension Load Cells or Comparable Platform Scales,
Compound Emission Rate ofAutomobile and Light Duty
accurate to 60.02 mg (0.05 lb).
Truck Topcoat Operations
EPAFederalReferenceMethod24DeterminationofVolatile
6.3 Film Thickness Gage, seeTest Methods D1005, D1186,
Matter Content, Water Content, Density, Volume Solids,
and D1400 for type of film thickness measurement of device.
and Weight Solids of Surface Coatings. 40 Code of
6.4 Targets,consistingofthepartstobecoated.Aminimum
Federal Regulations, Part 60, Appendix A
of two targets is required.The larger the number of targets, the
2.3 National Fire Protection Documents:
greater the accuracy of the test.
NFPA33SprayApplicationUsingFlammableandCombus-
6.5 Rule and Calipers, for measuring the diameter of the
tible Materials
5 paint supply tank or pot, tank agitator shaft, etc.
NFPA86Standard for Ovens and Furnaces
6.6 Sample Containers, clean, dry, for sampling the paint
3. Terminology material.
3.1 Definitions of Terms Specific to This Standard:
7. Hazards
3.1.1 paint, n—the liquid material applied to coat or cover
the surface of the part.
7.1 For specific hazard information and guidance, consult
the supplier’s Safety Data Sheet (SDS) for the materials used.
3.1.2 transfereffıciency(volume),n—theratioofthevolume
of paint solids deposited to the volume of the paint solids
8. Paint Usage Measurement Procedures
sprayed, expressed as a percent.
8.1 Transfer efficiency measurement requires that accurate
3.1.3 transfer effıciency (weight), n—the ratio of the weight
of paint solids deposited to the weight of the paint solids measurement be made of the quantity of paint material used in
the application process during the time period associated with
sprayed, expressed as a percent.
thecoatingoftheparts.Twogeneralmethodsareapplicablefor
3.1.4 volume of paint solids, n—thedifferenceinthevolume
accurately measuring paint usage.
of the paint solids on the part before painting and the volume
8.1.1 The preferred method is to determine the weight of
of the paint solids on the part after painting.
paint used during the application period studied.
3.1.5 volume percent solids, n—thesolidscontentaspercent
8.1.2 Where direct paint usage measurement by weight is
of the total volume of a sample of paint used.
not practical, an alternative approach for determining paint
3.1.6 weight of paint solids, n—the difference in the weight
usage by volume is given. The latter approach involves
of the part before painting and the weight of the part after
measuring the drop in paint level in the paint supply tank (pot)
painting and baking.
during the application period studied.
8.1.3 Where paint meter/mix equipment is used to directly
4. Summary of Test Method
feedpaintapplicationequipment,paint-componentmeterread-
ings shall be deemed reliable when the meter is properly
4.1 The weight of liquid paint used per part is determined
calibrated in accordance with the equipment manufacturer’s
(ProcedureA). The weight solids content of the paint material
calibration instructions or local calibration procedures.
is determined and used to calculate the paint solids sprayed.
The transfer efficiency is calculated by dividing the weight of
the paint solids deposited by the weight of the paint solids 9. Paint Usage Determination by Weight Procedure—
Procedure A
sprayed.
4.2 The volume of paint solids used per part is determined 9.1 Level and calibrate the weighing device for weighing
(Procedure B). The volume solids of the paint material is the paint supply tank (pot).
determined and used to calculate the paint solids sprayed. The
9.2 If an electronic weighing device is used, it must be
transfer efficiency is calculated by dividing the volume of the
turned on long enough to achieve stability, following the
paint solids deposited by the volume of the paint solids
manufacturer’s directions. All weighing devices must be situ-
sprayed.
ated to minimize disturbance from vibration or air movement.
9.3 Introduce the material reduced to spray viscosity, into
5. Significance and Use
the supply tank (pot) to be weighed. Before the test is
5.1 Subject to the limitations listed in 1.3, these test meth-
conducted, be certain that fluid flows are properly set, that all
ods can be used to optimize paint application processes.
supply and return lines are filled with the paint, and that no
leaks are present in the piping system.
4 9.4 Shut off the paint supply tank (pot) agitator to minimize
AvailablefromU.S.GovernmentPrintingOfficeSuperintendentofDocuments,
732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401, http:// vibration during the weighing process.
www.access.gpo.gov.
9.5 Weigh the paint supply tank (pot) before the test parts
Available from National Fire Protection Association (NFPA), 1 Batterymarch
Park, Quincy, MA 02169-7471, http://www.nfpa.org. are run. Weigh the tank until two consecutive measurements
D5286 − 01 (2017)
are obtained within the measurement accuracy of the weighing 9.19 Turnonthepaintsprayequipment.Maintainauniform
device. Average the two readings and record, P. paint flow during the test.
i
9.20 Turn off the paint spray equipment when the required
9.6 After painting the test parts, reweigh the paint supply
tank (pot) as in 9.5 and record, P. number of parts have been painted.
f
Paint Deposited Determination by Weight Measurement Method,
9.21 Bake the painted parts per the manufacturer’s recom-
Procedure A
mended cure schedule.
9.7 Setupthepaintsupplyequipmenttothesprayapparatus
9.22 Allow the parts to cool to room temperature prior to
in accordance with the manufacturer’s instructions.
weighing. Weighings should be repeated until the two weights
9.8 Ground all electrically conductive objects in the spray
are within the accuracy of the measuring equipment.
area, in accordance with Chapter 9.11 of NFPA33. Except for
9.23 Record the weights for the coated parts, W.
f
those objects required by the process to be at high voltage.
9.9 Prior to running the test, agitate the test paint in a paint
10. Paint Usage Determination by Volume Procedure—
supply tank (pot) at least 30 min before paint samples are
Procedure B
taken.
10.1 Measure the inside diameter of the paint supply tank
9.10 Using an airtight container, take a paint grab sample
(pot) and calculate the cross sectional area of the tank. If any
from the paint supply tank (pot) in accordance with Practice
objectsareinthemeasurementzonesuchasagitatorshafts,fill
D3925. pipes, etc, the cross sectional area of these objects must be
determined and the values subtracted from the cross sectional
9.11 Determine and record the following from the paint
area of the tank. The difference is the net cross sectional area.
sample:
10.2 Introduce the material, reduced to spray viscosity, into
9.11.1 Paint viscosity in accordance with Test Method
D1200, the supply tank (pot) to be measured. Before the test is
conducted, be certain that fluid flows are properly set, that all
9.11.2 Weight percent solids in accordance with Test
supply and return lines are filled with the paint, and that no
Method D2369. If the baking temperature in Test Method
leaks are present in the piping system.
D2369 is inadequate, use the manufacturer’s recommended
cure schedule, and
10.3 Record the paint supply tank (pot) levels before and
9.11.3 Electrical resistivity for samples applied electrostati-
after the test. Take the initial reading just prior to painting the
cally.
first test part. Take the final reading just after the last part has
beenpainted.Makesurethatthemeasurementsaretakentothe
9.12 Numbereachpart,beforeweighing,usingapermanent
nearest ⁄16 in. with a measuring stick. Measurements are made
marking pen.
from the top of the paint supply tank (pot) to the top of the
9.13 Weigh each part and record the uncoated weight, W
I
liquid level. The top of the paint supply tank (pot) is deter-
and the part number.
mined by laying a straightedge across the top of the paint
9.14 Attachthepreweighed,labeledpartstothepartholder. supply tank (pot) in the same position for each measurement.
The volume of any objects in the measurement zone such as
9.15 If electrostatic equipment is used, the resistance shall
agitator shafts, fill pipes, etc. must be subtracted from the total
be less than 1×10 Ω between the target and earth ground in
volume. Calculate the volume of paint used, V by multiplying
accordance with Chapter 9.8 of NFPA 33.
this difference in liquid levels, before and after the test by the
9.16 Adjust the following equipment operating parameters,
net cross sectional area determined in 10.1.
as appropriate, to the values desired for testing:
10.3.1 Warning: Measuring devices used in this procedure
9.16.1 Paint fluid pressure, at spray gun, psi (kPa), must be effectively grounded before contacting the paint
9.16.2 Atomizing air pressure, at spray gun, psi (kPa), supply tank (pot) or the liquid surface of the paint.
9.16.3 Rotating atomizer head speed (revolutions per min-
Paint Deposited Determination by Volume Measurement
ute) with and without paint fluid flow,
Method, Procedure B
9.16.4 Operating voltage (kilovolts) if electrostatic equip-
10.4 Set up the paint supply equipment to the spray appa-
ment is used,
ratus in accordance with the manufacturer’s instructions.
9.16.5 Ambient air temperature, ° Fahrenheit (Celsius).
9.16.6 Paint fluid temperature, ° Fahrenheit (Celsius) and
10.5 Ground all electrically conductive objects in the spray
9.16.7 Relative humidity (percent).
area, except those objects required by the process to be at high
voltage in accordance with Chapter 9 to 11 of NFPA33.
9.17 For electrostatic spray equipment, measure the operat-
ing voltage and adjust it according to the manufacturer’s 10.6 Priortorunningthetest,agitatethetestpaintinapaint
instructions.
supply tank (pot) at least 30 min before paint samples are
taken.
9.18 Run a control part weighing before, W and after, W
ci cf
the drying step. Do not apply paint to the control
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D5286 − 01 (Reapproved 2011) D5286 − 01 (Reapproved 2017)
Standard Test Methods for
Determination of Transfer Efficiency Under General
Production Conditions for Spray Application of Paints
This standard is issued under the fixed designation D5286; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 These test methods cover the determination of the transfer efficiency of spray-applied coatings under general plant
conditions. Transfer efficiency is the ratio of paint solids deposited to the total paint solids used during the application process,
expressed as a percent.
1.2 The transfer efficiency is calculated from the weight or volume of the paint solids sprayed and that of the paint solids
deposited on the painted part.
1.3 Limitations include the ability to accurately determine the amount of paint solids deposited on the part and the capability
of accurate measurement of the amount of paint sprayed.
1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
NOTE 1—These test methods apply to general plant production equipment and procedures. A method specific to automotive plants is defined in Test
Method D5066.
NOTE 2—The relationship between volatile organic compound emission rates and transfer efficiency in automobile and light duty truck topcoat
operations, EPA 450/3-88-01, referenced in Test Method D5066 does not apply to general production facilities.
NOTE 3—A single-point transfer efficiency measurement may not represent the entire process.
NOTE 4—The operator and the spray-application equipment-operating conditions during the transfer efficiency measurement should be representative
of normal operating conditions.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory
limitations prior to use. For specific hazard statements see Section 7, and 10.3.1.
NOTE 5—These test methods have not been adopted by federal regulatory agencies for demonstration of compliance with air pollution regulations such
as VOC, HAPS, etc.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards:
D1005 Test Method for Measurement of Dry-Film Thickness of Organic Coatings Using Micrometers
D1186 Test Methods for Nondestructive Measurement of Dry Film Thickness of Nonmagnetic Coatings Applied to a Ferrous
Base (Withdrawn 2006)
D1200 Test Method for Viscosity by Ford Viscosity Cup
D1400 Test Method for Nondestructive Measurement of Dry Film Thickness of Nonconductive Coatings Applied to a
Nonferrous Metal Base (Withdrawn 2006)
D1475 Test Method For Density of Liquid Coatings, Inks, and Related Products
D2369 Test Method for Volatile Content of Coatings
These test methods are under the jurisdiction of ASTM Committee D01 on Paint and Related Coatings, Materials, and Applications and are the direct responsibility of
Subcommittee D01.55 on Factory Applied Coatings on Preformed Products.
Current edition approved June 1, 2011June 1, 2017. Published June 2011June 2017. Originally approved in 1993. Last previous edition approved in 20052011 as
D5286 – 01 (2005).(2011). DOI: 10.1520/D5286-01R11.10.1520/D5286-01R17.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’sstandard’s Document Summary page on the ASTM website.
The last approved version of this historical standard is referenced on www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D5286 − 01 (2017)
D2697 Test Method for Volume Nonvolatile Matter in Clear or Pigmented Coatings
D3925 Practice for Sampling Liquid Paints and Related Pigmented Coatings
D5066 Test Method for Determination of the Transfer Efficiency Under Production Conditions for Spray Application of
Automotive Paints—Weight Basis
2.2 U.S. Government Standards:
EPA 450 ⁄3-88-018 U.S. Environmental Protection Agency Protocol for Determining the Daily Volatile Organic Compound
Emission Rate of Automobile and Light Duty Truck Topcoat Operations
EPA Federal Reference Method 24 Determination of Volatile Matter Content, Water Content, Density, Volume Solids, and
Weight Solids of Surface Coatings. 40 Code of Federal Regulations, Part 60, Appendix A
2.3 National Fire Protection Documents:
NFPA 33 Spray Application Using Flammable and Combustible Materials
NFPA 86 Standard for Ovens and Furnaces
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 paint, n—the liquid material applied to coat or cover the surface of the part.
3.1.2 transfer effıciency (volume), n—the ratio of the volume of paint solids deposited to the volume of the paint solids sprayed,
expressed as a percent.
3.1.3 transfer effıciency (weight), n—the ratio of the weight of paint solids deposited to the weight of the paint solids sprayed,
expressed as a percent.
3.1.4 volume of paint solids, n—the difference in the volume of the paint solids on the part before painting and the volume of
the paint solids on the part after painting.
3.1.5 volume percent solids, n—the solids content as percent of the total volume of a sample of paint used.
3.1.6 weight of paint solids, n—the difference in the weight of the part before painting and the weight of the part after painting
and baking.
4. Summary of Test Method
4.1 The weight of liquid paint used per part is determined (Procedure A). The weight solids content of the paint material is
determined and used to calculate the paint solids sprayed. The transfer efficiency is calculated by dividing the weight of the paint
solids deposited by the weight of the paint solids sprayed.
4.2 The volume of paint solids used per part is determined (Procedure B). The volume solids of the paint material is determined
and used to calculate the paint solids sprayed. The transfer efficiency is calculated by dividing the volume of the paint solids
deposited by the volume of the paint solids sprayed.
5. Significance and Use
5.1 Subject to the limitations listed in 1.3, these test methods can be used to optimize paint application processes.
6. Apparatus
6.1 Laboratory Scale, accurate to 60.001 g.
6.2 Tension Load Cells or Comparable Platform Scales, accurate to 60.02 mg (0.05 lb).
6.3 Film Thickness Gage, see Test Methods D1005, D1186, and D1400 for type of film thickness measurement of device.
6.4 Targets, consisting of the parts to be coated. A minimum of two targets is required. The larger the number of targets, the
greater the accuracy of the test.
6.5 Rule and Calipers, for measuring the diameter of the paint supply tank or pot, tank agitator shaft, etc.
6.6 Sample Containers, clean, dry, for sampling the paint material.
7. Hazards
7.1 For specific hazard information and guidance, consult the supplier’s Material supplier’s Safety Data Sheet (MSDS)(SDS)
for the materials used.
Available from U.S. Government Printing Office Superintendent of Documents, 732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401, http://
www.access.gpo.gov.
Available from National Fire Protection Association (NFPA), 1 Batterymarch Park, Quincy, MA 02169-7471, http://www.nfpa.org.
D5286 − 01 (2017)
8. Paint Usage Measurement Procedures
8.1 Transfer efficiency measurement requires that accurate measurement be made of the quantity of paint material used in the
application process during the time period associated with the coating of the parts. Two general methods are applicable for
accurately measuring paint usage.
8.1.1 The preferred method is to determine the weight of paint used during the application period studied.
8.1.2 Where direct paint usage measurement by weight is not practical, an alternative approach for determining paint usage by
volume is given. The latter approach involves measuring the drop in paint level in the paint supply tank (pot) during the application
period studied.
8.1.3 Where paint meter/mix equipment is used to directly feed paint application equipment, paint-component meter readings
shall be deemed reliable when the meter is properly calibrated in accordance with the equipment manufacturer’smanufacturer’s
calibration instructions or local calibration procedures.
9. Paint Usage Determination by Weight Procedure—Procedure A
9.1 Level and calibrate the weighing device for weighing the paint supply tank (pot).
9.2 If an electronic weighing device is used, it must be turned on long enough to achieve stability, following the
manufacturer’smanufacturer’s directions. All weighing devices must be situated to minimize disturbance from vibration or air
movement.
9.3 Introduce the material reduced to spray viscosity, into the supply tank (pot) to be weighed. Before the test is conducted, be
certain that fluid flows are properly set, that all supply and return lines are filled with the paint, and that no leaks are present in
the piping system.
9.4 Shut off the paint supply tank (pot) agitator to minimize vibration during the weighing process.
9.5 Weigh the paint supply tank (pot) before the test parts are run. Weigh the tank until two consecutive measurements are
obtained within the measurement accuracy of the weighing device. Average the two readings and record, P .
i
9.6 After painting the test parts, reweigh the paint supply tank (pot) as in 9.5 and record, P .
f
Paint Deposited Determination by Weight Measurement Method,
Procedure A
9.7 Set up the paint supply equipment to the spray apparatus in accordance with the manufacturer’smanufacturer’s instructions.
9.8 Ground all electrically conductive objects in the spray area, in accordance with Chapter 9.11 of NFPA 33. Except for those
objects required by the process to be at high voltage.
9.9 Prior to running the test, agitate the test paint in a paint supply tank (pot) at least 30 min before paint samples are taken.
9.10 Using an airtight container, take a paint grab sample from the paint supply tank (pot) in accordance with Practice D3925.
9.11 Determine and record the following from the paint sample:
9.11.1 Paint viscosity in accordance with Test Method D1200,
9.11.2 Weight percent solids in accordance with Test Method D2369. If the baking temperature in Test Method D2369 is
inadequate, use the manufacturer’smanufacturer’s recommended cure schedule, and
9.11.3 Electrical resistivity for samples applied electrostatically.
9.12 Number each part, before weighing, using a permanent marking pen.
9.13 Weigh each part and record the uncoated weight, W and the part number.
i I
9.14 Attach the preweighed, labeled parts to the part holder.
9.15 If electrostatic equipment is used, the resistance shall be less than 1 × 10 Ω between the target and earth ground in
accordance with Chapter 9.8 of NFPA 33.
9.16 Adjust the following equipment operating parameters, as appropriate, to the values desired for testing:
9.16.1 Paint fluid pressure, at spray gun, psi (kPa),
9.16.2 Atomizing air pressure, at spray gun, psi (kPa),
9.16.3 Rotating atomizer head speed (revolutions per minute) with and without paint fluid flow,
9.16.4 Operating voltage (kilovolts) if electrostatic equipment is used,
9.16.5 Ambient air temperature, ° Fahrenheit (Celsius).
9.16.6 Paint fluid temperature, ° Fahrenheit (Celsius) and
9.16.7 Relative humidity (percent).
9.17 For electrostatic spray equipment, measure the operating voltage and adjust it according to the
manufacturer’smanufacturer’s instructions.
D5286 − 01 (2017)
9.18 Run a control part weighing before, W and after, W the drying step. Do not apply paint to the control part. The control
ci cf
part is used to determine if there is any weight loss from miscellaneous materials that may occur in the drying step.
9.19 Turn on the paint spray equipment. Maintain a uniform paint flow during the test.
9.20 Turn off the paint spray equipment when the required number of parts have been painted.
9.21 Bake the painted parts per the manufacturer’smanufacturer’s recommended cure schedule.
9.22 Allow the parts to cool to room temperature prior to weighing. Weighings should be repeated until the two weights are
within the accuracy of the measuring equipment.
9.23 Record the weights for the coated parts, W .
f
10. Paint Usage Determination by Volume Procedure—Procedure B
10.1 Measure the inside diameter of the paint supply tank (pot) and calculate the cross sectional area of the tank. If any objects
are in the measurement zone such as agitator shafts, fill pipes, etc, the cross sectional area of these objects must be determined
and the values subtracted from the cross sectional area of the tank. The difference is the net cross sectional area.
10.2 Introduce the material, reduced to spray viscosity, into the supply tank (pot) to be measured. Before the test is conducted,
be certain that fluid flows are properly set, that all supply and return lines are filled with the paint, and that no leaks are present
in the piping system.
10.3 Record the paint supply tank (pot) levels before and after the test. Take the initial reading just prior to painting the first
test part. Take the final reading just after the last part has been painted. Make sure that the measurements are taken to the nearest
⁄16 in. with a measuring stick. Measurements are made from the top of the paint supply tank (pot) to the top of the liquid level.
The top of the paint supply tank (pot) is determined by laying a straightedge across the top of the paint supply tank (pot) in the
same position for each measurement. The volume of any objects in the measurement zone such as agitator shafts, fill pipes, etc.
must be subtracted from the tot
...
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