ASTM D7306-07

Standard Practice for Testing Low Temperature Film-Formation of Latex Paints by Visual Observation

SIGNIFICANCE AND USE
This practice can be used by paint formulators to determine if a given paint has the ability to form a film at low temperatures. This practice can be used as an aid for determining coalescing solvent level required to form a good film. Test Method D 3793 compares the porosity of a film drawn down at room temperature to another film drawn down and cured at low temperature.
This practice provides no absolute information, rather ranking only of the selected series of paints.
This practice can provide a pass-fail situation if known acceptable and unacceptable paints are included in the test.
SCOPE
1.1 This practice specifies a laboratory procedure for evaluating the ability of a latex paint to form a uniform film free of visible defects at low temperatures.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 31-Dec-2006
• 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 D7306-07(2013) - Standard Practice for Testing Low Temperature Film-Formation of Latex Paints by Visual Observation
• Effective Date: 01-Jun-2013
• Referred By: ASTM D5324-16(2022) - Standard Guide for Testing Water-Borne Architectural Coatings
• Effective Date: 01-Jan-2007
• Referred By: ASTM D3730-17(2022) - Standard Guide for Testing High-Performance Interior Architectural Wall Coatings
• Effective Date: 01-Jan-2007

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D7306 − 07
StandardPractice for
Testing Low Temperature Film-Formation of Latex Paints by
Visual Observation
This standard is issued under the fixed designation D7306; 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 is applied to a part-sealed/part-unsealed drawdown chart and
immediately placed in a cold cabinet.
1.1 This practice specifies a laboratory procedure for evalu-
ating the ability of a latex paint to form a uniform film free of 4.2 After 18 h the panel is removed from the cold cabinet
visible defects at low temperatures.
and evaluated for any cracking of the paint film.
1.2 The values stated in SI units are to be regarded as the
NOTE 1—Temperature of film formation testing may be altered upon
standard. The values given in parentheses are for information mutual consent of all parties involved.
only.
5. Significance and Use
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the 5.1 This practice can be used by paint formulators to
responsibility of the user of this standard to establish appro-
determine if a given paint has the ability to form a film at low
priate safety and health practices and determine the applica- temperatures. This practice can be used as an aid for determin-
bility of regulatory limitations prior to use. ing coalescing solvent level required to form a good film. Test
Method D3793 compares the porosity of a film drawn down at
2. Referenced Documents roomtemperaturetoanotherfilmdrawndownandcuredatlow
temperature.
2.1 ASTM Standards:
D823 Practices for Producing Films of Uniform Thickness
5.2 This practice provides no absolute information, rather
of Paint, Varnish, and Related Products on Test Panels
ranking only of the selected series of paints.
D3793 Test Method for Low-Temperature Coalescence of
5.3 This practice can provide a pass-fail situation if known
Latex Paint Films by Porosity Measurement (Withdrawn
acceptable and unacceptable paints are included in the test.
2012)
6. Apparatus and Materials
3. Terminology
6.1 Vacuum Plate.
3.1 Definitions:
6.2 Paint Test Chart with sealed and unsealed evaluation
3.1.1 low temperature coalescence (LTC), n—the ability of
areas.
a latex paint to form a film at low termperatures, typically
4 6 2°C (39 6 4°F).
6.3 Paint Applicator(s), typically to apply 3 and 10 mil wet
film thickness of paint with higher thickness being more
4. Summary of Practice
severe.
4.1 The paint, applicator and the test panel are allowed to
6.4 Cold Cabinet, maintaining 4 6 2°C (39 6 4°F) or a
equilibrateforatleast4hat4 62°C(39 64°F).Thetestpaint
different temperature as agreed upon.
6.5 Instrument, to record relative humidity (typically 20 to
100 %).
This practice is under the jurisdiction of ASTM Committee D01 on Paint and
Related Coatings, Materials, and Applications and is the direct responsibility of
NOTE 2—Variation in humidity can have impact on film formation.
Subcommittee D01.42 on Architectural Coatings.
Current edition approved Jan. 1, 2007. Published January 2007. DOI: 10.1520/ 6.6 4X – 12X Magnifying Glass,
D7306-07.
6.7 Test Paint.
For referenced ASTM standards, visit the ASTM website, www.astm
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