ASTM D3793-00

Standard Test Method for Low-Temperature Coalescence of Latex Paint Films

SCOPE
1.1 This test method covers the determination of the comparative coalescence of a series of latex paints by determining the porosity of films dried at standard and at low temperature. Porosity is evaluated with a penetrating medium as in Test Method D3258.  
1.2 The texture of the film, which can affect cleanup, will influence the results of the test. Stain applied to a high-hiding paint will not lower the reflectance as much as the same stain applied to a low-hiding paint of equal porosity. These points must be considered in comparing the different paints.  
1.3 This method should be used only for comparative testing within one laboratory, as the numerical results obtained by different laboratories do not usually agree.  
1.4 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
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.

General Information

• Status: Historical
• Publication Date: 09-Mar-2000
• ICS: 87.040 - Paints and varnishes
• Technical Committee: D01 - Paint and Related Coatings, Materials, and Applications
• Drafting Committee: D01.42 - Architectural Coatings

Relations

• Replaced By: ASTM D3793-04 - Standard Test Method for Low-Temperature Coalescence of Latex Paint Films
• Effective Date: 01-Jun-2004
• Referred By: ASTM D3730-17(2022) - Standard Guide for Testing High-Performance Interior Architectural Wall Coatings
• Effective Date: 10-Mar-2000
• Referred By: ASTM D5324-16(2022) - Standard Guide for Testing Water-Borne Architectural Coatings
• Effective Date: 10-Mar-2000
• Referred By: ASTM D6763-16(2022) - Standard Guide for Testing Exterior Wood Stains and Clear Water Repellents
• Effective Date: 10-Mar-2000
• Referred By: ASTM D6577-15(2019) - Standard Guide for Testing Industrial Protective Coatings
• Effective Date: 10-Mar-2000
• Referred By: ASTM D7306-07(2017) - Standard Practice for Testing Low Temperature Film-Formation of Latex Paints by Visual Observation
• Effective Date: 10-Mar-2000

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D 3793 – 00
Standard Test Method for
Low-Temperature Coalescence of Latex Paint Films
This standard is issued under the fixed designation D 3793; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope stained and unstained films indicates the porosity of that film;
the difference between the readings for the two temperatures
1.1 This test method covers the determination of the com-
indicates the coalescence of that film compared to others in the
parative coalescence of a series of latex paints by determining
series.
the porosity of films dried at standard and at low temperature.
Porosity is evaluated with a penetrating medium as in Test
4. Significance and Use
Method D 3258.
4.1 This test method provides no absolute information,
1.2 The texture of the film, which can affect cleanup, will
rather ranking only of the selected series of paints.
influence the results of the test. Stain applied to a high-hiding
4.2 This test method can provide a pass-fail situation if
paint will not lower the reflectance as much as the same stain
known acceptable and unacceptable paints are included in the
applied to a low-hiding paint of equal porosity. These points
test.
must be considered in comparing the different paints.
1.3 This method should be used only for comparative
5. Apparatus and Materials
testing within one laboratory, as the numerical results obtained
5.1 Plate Glass Panel (base for cardboard panel).
by different laboratories do not usually agree.
5.2 Strippable Adhesive.
1.4 The values stated in SI units are to be regarded as the
5.3 Test Panel—Smooth porous cardboard pane, such as the
standard. The values given in parentheses are for information
back of a white drawdown chart.
only.
5.4 Film Applicator, 150 mm (6 in.) wide with a clearance
1.5 This standard does not purport to address all of the
of 150 μm (6 mils).
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
NOTE 1—It should be noted that some applicators are marked with the
nominal wet film thickness, which is one half of the clearance.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. 1
5.5 Film Applicator, 140 mm (5 ⁄2 in.) wide with a clearance
of 255 μm (10 mils ).
2. Referenced Documents
5.6 Reflectometer, meeting the requirements of Test Method
2.1 ASTM Standards:
E 1347.
D 3258 Test Method for Porosity of Paint Films
5.7 Cold Cabinet, maintaining 4.5 6 1°C (40 6 2°F ) and
E 1347 Test Method for Color and Color Difference Mea-
50 6 5 % relative humidity.
surement of Object-Color Specimens by Tristimulus (Fil-
5.8 Camel’s Hair Brush, approximately 13 mm ( ⁄2in.) wide.
ter) Colorimetry
5.9 Plastic Wash Bottle, about 500 mL or 16 oz containing
mineral spirits of the odorless type.
3. Summary of Test Method
5.10 Penetrating Medium —A proprietary composition of
3.1 The test paints are applied to porous cardboard panels,
pigments or dye, or both, dispersed in a liquid vehicle.
dried at standard temperature and at 40°F (4.5°C) with 50 %
5.11 Filter Paper.
relative humidity in both cases, and their reflectances mea-
sured. A special colored penetrating medium is applied to each,
the excess removed in a specified manner, and reflectances
Any strippable adhesive such as represented by the following formulas: vinyl
acrylic emulsion (800 parts by weight) and polyethylene glycol, molecular weight
measured again. The difference between the readings on the
1450, (16 parts by weight).
White cardboard drawdown chart, Form WA, from the Leneta Co., 15 Whitney
Rd., Mahwah, NJ 07430, was used in the original test method to get the results.
1 6
This test method is under the jurisdiction of ASTM Committee D-1 on Paint The Dow latex film caster from Byk-Gardner, Inc. Gardner Laboratory, 2435
and Related Coatings, Materials, and Applications and is the direct responsibility of Linden Lane, Silver Spring, MD 20910, was used originally in this test method.
Subcommittee D01.42 on Architectural Finishes. The sole source of supply of the special compound,K&N S-68, known to the
Current edition approved March 10, 2000. Published May 2000. Originally committee at this time is theK&N Laboratories, Inc. 5331 Dansher Rd.,
published as D 3793 – 79. Last previous edition D 3793 – 95. Countryside, IL 60525. If you are aware of alternative suppliers, please provide this
Annual Book of ASTM Standards, Vol 06.02. information to ASTM Heqdquarters. Your comments will receive careful consider-
3 1
Annual Book of
...