ASTM D7538-09(2018)
(Practice)Standard Practice for Evaluating the Water Wash-Off Resistance of Traffic Paints Using an Atomizing Spray Device
Standard Practice for Evaluating the Water Wash-Off Resistance of Traffic Paints Using an Atomizing Spray Device
SIGNIFICANCE AND USE
5.1 After waterborne traffic paints are applied to a road pavement, it is important that they be sufficiently coalesced or cured so they will not be removed by rain. This practice can be used to determine the relative water wash-off resistance of waterborne traffic paints when exposed to a water spray simulated rain.
SCOPE
1.1 A newly applied traffic paint film may be exposed to rain of varying intensities shortly after application. Practice D7377 describes a practice for evaluating the water wash-off resistance of traffic paints to a hard rain using a steady stream of water from a faucet at a rate of approximately 5.7 L per min. Practice D7538 is a similar practice that describes the use of an adjustable nozzle atomizing spray device to deliver a spray of water that simulates rain rates from approximately 0.05 to 0.5 L per min. This test can be used to compare conventional and fast-dry traffic paints for their relative ability to withstand rain soon after application on roadway surfaces.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.4 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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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.
Designation: D7538 − 09 (Reapproved 2018)
Standard Practice for
Evaluating the Water Wash-Off Resistance of Traffic Paints
Using an Atomizing Spray Device
This standard is issued under the fixed designation D7538; 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 D711 Test Method for No-Pick-Up Time of Traffic Paint
D823 Practices for Producing Films of Uniform Thickness
1.1 Anewlyappliedtrafficpaintfilmmaybeexposedtorain
of Paint, Coatings and Related Products on Test Panels
of varying intensities shortly after application. Practice D7377
D1005 Test Method for Measurement of Dry-Film Thick-
describes a practice for evaluating the water wash-off resis-
ness of Organic Coatings Using Micrometers
tance of traffic paints to a hard rain using a steady stream of
D1212 Test Methods for Measurement of Wet Film Thick-
water from a faucet at a rate of approximately 5.7 L per min.
ness of Organic Coatings
Practice D7538 is a similar practice that describes the use of an
D3924 Specification for Standard Environment for Condi-
adjustable nozzle atomizing spray device to deliver a spray of
tioning and Testing Paint, Varnish, Lacquer, and Related
water that simulates rain rates from approximately 0.05 to 0.5
Materials (Withdrawn 2016)
L per min. This test can be used to compare conventional and
D4414 Practice for Measurement of Wet Film Thickness by
fast-dry traffic paints for their relative ability to withstand rain
Notch Gages
soon after application on roadway surfaces.
D7377 Practice for Evaluating the Water Wash-Off Resis-
1.2 The values stated in SI units are to be regarded as
tance of Traffic Paints using a Water Faucet
standard. No other units of measurement are included in this
standard.
3. Terminology
1.3 This standard does not purport to address all of the
3.1 Definitions:
safety concerns, if any, associated with its use. It is the
3.1.1 conventional waterborne traffıc paint, n—an aqueous
responsibility of the user of this standard to establish appro-
traffic paint that uses a conventional-dry latex binder.
priate safety, health, and environmental practices and deter-
3.1.1.1 Discussion—Typical no-pick-up dry times, as pre-
mine the applicability of regulatory limitations prior to use.
scribedinTestMethodD711,forconventionaltrafficpaintsare
1.4 This international standard was developed in accor-
20 to 45 min.
dance with internationally recognized principles on standard-
3.1.2 durable fast-dry waterborne traffıc paint, n—an aque-
ization established in the Decision on Principles for the
ous traffic paint that uses a third generation durable fast-dry
Development of International Standards, Guides and Recom-
latex binder.
mendations issued by the World Trade Organization Technical
3.1.2.1 Discussion—Air or airless spray application on
Barriers to Trade (TBT) Committee.
roadways is typically 0.64 mm wet or about 0.39 mm dry. The
range of application for durable waterborne paints is 0.56 to
2. Referenced Documents
0.89 mm wet, but sometimes the durable paints are also striped
2.1 ASTM Standards:
at standard line thickness.
D562 Test Method for Consistency of Paints Measuring
3.1.3 fast-dry waterborne traffıc paint, n—an aqueous traffic
KrebsUnit(KU)ViscosityUsingaStormer-TypeViscom-
paint that uses a fast-dry traffic latex binder.
eter
3.1.3.1 Discussion—Typical no-pick-up dry times, as pre-
scribed in Test Method D711, for fast-dry traffic paints are <10
min.
This practice is under the jurisdiction of ASTM Committee D01 on Paint and
Related Coatings, Materials, and Applications and is the direct responsibility of
3.1.4 standard line fast-dry waterborne traffıc paint, n—an
Subcommittee D01.44 on Traffic Coatings.
aqueous traffic paint that uses a first or second generation
Current edition approved Sept. 1, 2018. Published September 2018. Originally
approved in 2009. Last previous edition approved in 2013 as D7538 – 09 (2013).
fast-dry latex binder.
DOI: 10.1520/D7538-09R18.
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’s Document Summary page on The last approved version of this historical standard is referenced on
the ASTM website. www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D7538 − 09 (2018)
3.1.4.1 Discussion—Air or airless spray application on 6.12 Timer, to time the film-drying and the water spray
roadways is typically 0.38 mm wet or about 0.23 mm dry. periods.
3.1.5 waterborne traffıc paint, n—an aqueous traffic paint
7. Reagents
(usually white or yellow) containing either a conventional or
fast-dry latex binder. 7.1 Tap Water—to partially fill the sprayer container.
3.1.6 water wash-off, n—the erosion or removal of freshly 7.2 Acetone—to clean glass plates prior to paint application
applied traffic paint in the field by rain or in the laboratory
(not needed for draw-down charts since they are not reused.)
using simulated rain.
8. Procedure
3.1.6.1 Discussion—Sometimes referred to as water wash-
out.
8.1 Paint Consistency:
8.1.1 Determine the Krebs (KU) viscosity of the paint in
4. Summary of Practice
accordance with Test Method D562 using a paddle-type
4.1 This practice involves preparing a series of uniform
viscometer as prescribed by Test Method D562. This determi-
thickness films of traffic paint on standard substrates.The films
nation is optional but can be important since the dry time of the
are allowed to dry over different time periods in a conditioned
traffic paint and water-wash off performance can be affected by
environment, and then each paint film is subsequently sub-
the paint viscosity.
jected to a water spray. Films are wash-off resistant when no
8.2 Calibration of Atomizing Spray Devices:
paint is removed by the water spray.
8.2.1 Partially fill the finger pumped, adjustable nozzle
5. Significance and Use
spray bottle or adjustable nozzle garden-type sprayer with at
least 2
...
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D7538 − 09 (Reapproved 2018)
Standard Practice for
Evaluating the Water Wash-Off Resistance of Traffic Paints
Using an Atomizing Spray Device
This standard is issued under the fixed designation D7538; 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 D711 Test Method for No-Pick-Up Time of Traffic Paint
D823 Practices for Producing Films of Uniform Thickness
1.1 A newly applied traffic paint film may be exposed to rain
of Paint, Coatings and Related Products on Test Panels
of varying intensities shortly after application. Practice D7377
D1005 Test Method for Measurement of Dry-Film Thick-
describes a practice for evaluating the water wash-off resis-
ness of Organic Coatings Using Micrometers
tance of traffic paints to a hard rain using a steady stream of
D1212 Test Methods for Measurement of Wet Film Thick-
water from a faucet at a rate of approximately 5.7 L per min.
ness of Organic Coatings
Practice D7538 is a similar practice that describes the use of an
D3924 Specification for Standard Environment for Condi-
adjustable nozzle atomizing spray device to deliver a spray of
tioning and Testing Paint, Varnish, Lacquer, and Related
water that simulates rain rates from approximately 0.05 to 0.5
Materials (Withdrawn 2016)
L per min. This test can be used to compare conventional and
D4414 Practice for Measurement of Wet Film Thickness by
fast-dry traffic paints for their relative ability to withstand rain
Notch Gages
soon after application on roadway surfaces.
D7377 Practice for Evaluating the Water Wash-Off Resis-
1.2 The values stated in SI units are to be regarded as
tance of Traffic Paints using a Water Faucet
standard. No other units of measurement are included in this
standard.
3. Terminology
1.3 This standard does not purport to address all of the
3.1 Definitions:
safety concerns, if any, associated with its use. It is the
3.1.1 conventional waterborne traffıc paint, n—an aqueous
responsibility of the user of this standard to establish appro-
traffic paint that uses a conventional-dry latex binder.
priate safety, health, and environmental practices and deter-
3.1.1.1 Discussion—Typical no-pick-up dry times, as pre-
mine the applicability of regulatory limitations prior to use.
scribed in Test Method D711, for conventional traffic paints are
1.4 This international standard was developed in accor-
20 to 45 min.
dance with internationally recognized principles on standard-
3.1.2 durable fast-dry waterborne traffıc paint, n—an aque-
ization established in the Decision on Principles for the
ous traffic paint that uses a third generation durable fast-dry
Development of International Standards, Guides and Recom-
latex binder.
mendations issued by the World Trade Organization Technical
3.1.2.1 Discussion—Air or airless spray application on
Barriers to Trade (TBT) Committee.
roadways is typically 0.64 mm wet or about 0.39 mm dry. The
range of application for durable waterborne paints is 0.56 to
2. Referenced Documents
0.89 mm wet, but sometimes the durable paints are also striped
2.1 ASTM Standards:
at standard line thickness.
D562 Test Method for Consistency of Paints Measuring
3.1.3 fast-dry waterborne traffıc paint, n—an aqueous traffic
Krebs Unit (KU) Viscosity Using a Stormer-Type Viscom-
paint that uses a fast-dry traffic latex binder.
eter
3.1.3.1 Discussion—Typical no-pick-up dry times, as pre-
scribed in Test Method D711, for fast-dry traffic paints are <10
min.
This practice is under the jurisdiction of ASTM Committee D01 on Paint and
Related Coatings, Materials, and Applications and is the direct responsibility of
3.1.4 standard line fast-dry waterborne traffıc paint, n—an
Subcommittee D01.44 on Traffic Coatings.
aqueous traffic paint that uses a first or second generation
Current edition approved Sept. 1, 2018. Published September 2018. Originally
approved in 2009. Last previous edition approved in 2013 as D7538 – 09 (2013). fast-dry latex binder.
DOI: 10.1520/D7538-09R18.
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’s Document Summary page on The last approved version of this historical standard is referenced on
the ASTM website. www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D7538 − 09 (2018)
3.1.4.1 Discussion—Air or airless spray application on 6.12 Timer, to time the film-drying and the water spray
roadways is typically 0.38 mm wet or about 0.23 mm dry. periods.
3.1.5 waterborne traffıc paint, n—an aqueous traffic paint
7. Reagents
(usually white or yellow) containing either a conventional or
7.1 Tap Water—to partially fill the sprayer container.
fast-dry latex binder.
3.1.6 water wash-off, n—the erosion or removal of freshly
7.2 Acetone—to clean glass plates prior to paint application
applied traffic paint in the field by rain or in the laboratory (not needed for draw-down charts since they are not reused.)
using simulated rain.
8. Procedure
3.1.6.1 Discussion—Sometimes referred to as water wash-
out.
8.1 Paint Consistency:
8.1.1 Determine the Krebs (KU) viscosity of the paint in
4. Summary of Practice
accordance with Test Method D562 using a paddle-type
4.1 This practice involves preparing a series of uniform
viscometer as prescribed by Test Method D562. This determi-
thickness films of traffic paint on standard substrates. The films
nation is optional but can be important since the dry time of the
are allowed to dry over different time periods in a conditioned
traffic paint and water-wash off performance can be affected by
environment, and then each paint film is subsequently sub-
the paint viscosity.
jected to a water spray. Films are wash-off resistant when no
8.2 Calibration of Atomizing Spray Devices:
paint is removed by the water spray.
8.2.1 Partially fill the finger pumped, adjustable nozzle
5. Significance and Use
spray bottle or adjustable nozzle garden-type sprayer with at
least 250 mL of clean tap water and allow to equilibrate to
5.1 After waterborne traffic paints are applied to a road
room tempera
...
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: D7538 − 09 (Reapproved 2013) D7538 − 09 (Reapproved 2018)
Standard Practice for
Evaluating the Water Wash-Off Resistance of Traffic Paints
Using an Atomizing Spray Device
This standard is issued under the fixed designation D7538; 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 A newly applied traffic paint film may be exposed to rain of varying intensities shortly after application. Practice D7377
describes a practice for evaluating the water wash-off resistance of traffic paints to a hard rain using a steady stream of water from
a faucet at a rate of approximately 5.7 L per min. Practice D7538 is a similar practice that describes the use of an adjustable nozzle
atomizing spray device to deliver a spray of water that simulates rain rates from approximately 0.05 to 0.5 L per min. This test
can be used to compare conventional and fast-dry traffic paints for their relative ability to withstand rain soon after application on
roadway surfaces.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.4 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:
D562 Test Method for Consistency of Paints Measuring Krebs Unit (KU) Viscosity Using a Stormer-Type Viscometer
D711 Test Method for No-Pick-Up Time of Traffic Paint
D823 Practices for Producing Films of Uniform Thickness of Paint, Coatings and Related Products on Test Panels
D1005 Test Method for Measurement of Dry-Film Thickness of Organic Coatings Using Micrometers
D1212 Test Methods for Measurement of Wet Film Thickness of Organic Coatings
D3924 Specification for Standard Environment for Conditioning and Testing Paint, Varnish, Lacquer, and Related Materials
(Withdrawn 2016)
D4414 Practice for Measurement of Wet Film Thickness by Notch Gages
D7377 Practice for Evaluating the Water Wash-Off Resistance of Traffic Paints using a Water Faucet
3. Terminology
3.1 Definitions:
3.1.1 conventional waterborne traffıc paint, n—an aqueous traffic paint that uses a conventional-dry latex binder.
3.1.1.1 Discussion—
Typical no-pick-up dry times, as prescribed in Test Method D711, for conventional traffic paints are 20 to 45 min.
This practice is under the jurisdiction of ASTM Committee D01 on Paint and Related Coatings, Materials, and Applications and is the direct responsibility of
Subcommittee D01.44 on Traffic Coatings.
Current edition approved Nov. 1, 2013Sept. 1, 2018. Published November 2013September 2018. Originally approved in 2009. Last previous edition approved in 20092013
as D7538 – 09. 09 (2013). DOI: 10.1520/D7538-09R13.10.1520/D7538-09R18.
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
D7538 − 09 (2018)
3.1.2 durable fast-dry waterborne traffıc paint, n—an aqueous traffic paint that uses a third generation durable fast-dry latex
binder.
3.1.2.1 Discussion—
Air or airless spray application on roadways is typically 0.64 mm wet or about 0.39 mm dry. The range of application for durable
waterborne paints is 0.56 to 0.89 mm wet, but sometimes the durable paints are also striped at standard line thickness.
3.1.3 fast-dry waterborne traffıc paint, n—an aqueous traffic paint that uses a fast-dry traffic latex binder.
3.1.3.1 Discussion—
Typical no-pick-up dry times, as prescribed in Test Method D711, for fast-dry traffic paints are <10 min.
3.1.4 standard line fast-dry waterborne traffıc paint, n—an aqueous traffic paint that uses a first or second generation fast-dry
latex binder.
3.1.4.1 Discussion—
Air or airless spray application on roadways is typically 0.38 mm wet or about 0.23 mm dry.
3.1.5 waterborne traffıc paint, n—an aqueous traffic paint (usually white or yellow) containing either a conventional or fast-dry
latex binder.
3.1.6 water wash-off, n—the erosion or removal of freshly applied traffic paint in the field by rain or in the laboratory using
simulated rain.
3.1.6.1 Discussion—
Sometimes referred to as water wash-out.
4. Summary of Practice
4.1 This practice involves preparing a series of uniform thickness films of traffic paint on standard substrates. The films are
allowed to dry over different time periods in a conditioned environment, and then each paint film is subsequently subjected to a
water spray. Films are wash-off resistant when no paint is removed by the water spray.
5. Significance and Use
5.1 After waterborne traffic paints are applied to a road pavement, it is important that they be sufficiently coalesced or cured
so they will not be removed by rain. This practice can be used to determine the relative water wash-off resistance of waterborne
traffic paints when exposed to a water spray simulated rain.
6. Apparatus and Equipment
6.1 Paddle Type Viscometer, to measure viscosity (in Krebs units) of the traffic paint prior to application.
6.2 Conditioned Room, at 23 6 2°C and 50 6 5 % relative humidity for film draw-downs and film drying.
6.3 Humidity Gauge, to record relative humidity during the drying period.
6.4 Thermometers, to record the air and water temperatures.
6.5 Spatula, to mix the paint prior to application.
6.6
...
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