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ASTM D3732-82(2001)

(Practice)

Standard Practice for Reporting Cure Times of Ultraviolet-Cured Coatings

Standard Practice for Reporting Cure Times of Ultraviolet-Cured Coatings

SCOPE
1.1 This practice applies to all coatings cured by ultraviolet energy.
1.2 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-2000
ICS
87.040 - Paints and varnishes
Technical Committee
D01 - Paint and Related Coatings, Materials, and Applications
Drafting Committee
D01.55 - Factory Applied Coatings on Preformed Products
Current Stage
Ref Project

Relations

Replaces
ASTM D3732-82(1996)e1 - Standard Practice for Reporting Cure Times of Ultraviolet-Cured Coatings
Effective Date
01-Jan-2001
Replaced By
ASTM D3732-82(2005) - Standard Practice for Reporting Cure Times of Ultraviolet-Cured Coatings
Effective Date
15-May-2005
Referred By
ASTM D7188-05(2019) - Standard Terminology for Printing Inks, Materials, and Processes
Effective Date
01-Jan-2001

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ASTM D3732-82(2001) - Standard Practice for Reporting Cure Times of Ultraviolet-Cured CoatingsASTM D3732-82(2001) - Standard Practice for Reporting Cure Times of Ultraviolet-Cured Coatings
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ASTM D3732-82(2001) - Standard Practice for Reporting Cure Times of Ultraviolet-Cured Coatings
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D3732–82 (Reapproved 2001)
Standard Practice for
Reporting Cure Times of Ultraviolet-Cured Coatings
This standard is issued under the fixed designation D 3732; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 3. Terminology
1.1 This practice applies to all coatings cured by ultraviolet 3.1 Definitions of Terms Specific to This Standard:
energy. 3.1.1 cure—the condition of a coating after conversion to
1.2 This standard does not purport to address all of the the final state of cure as measured by tests generally related to
safety concerns, if any, associated with its use. It is the end-use performance and mutually agreeable to supplier and
responsibility of the user of this standard to establish appro- purchaser.
priate safety and health practices and determine the applica- 3.1.2 ultraviolet curing—conversion of a coating from its
bility of regulatory limitations prior to use. application state to its final use state by means of a mechanism
initiated by ultraviolet radiation generated by equipment de-
2. Referenced Documents
signed for that purpose.
2.1 ASTM Standards:
4. Significance and Use
D 658 Test Method for Abrasion Resistance of Organic
Coatings by Air Blast Abrasive 4.1 This practice provides a guide whereby all pertinent
D 968 Test Methods for Abrasion Resistance of Organic variables relating to the ultraviolet cure of a coating are
Coatings by Falling Abrasive described.
D 1474 Test Methods for Indentation Hardness of Organic
5. Procedure
Coatings
5.1 Apply the coating to be cured to the desired substrate at
D 2197 Test Methods for Adhesion of Organic Coatings by
Scrape Adhesion a film thickness typical to that normally used. After approxi-
D 2336 Guide for Specifying Factory Applied Wood Coat- mately the time delay encountered in production pass the
coated substrate through the curing equipment and subse-
ings
D 2793 Test Method for Block Resistance of Organic Coat- quently test for cure, as defined in 3.1.1, using the appropriate
methods listed in 5.1.1 through 5.1.11. The most commonly
ings on Wood Substrates
D 2794 Test Method for Resistance of Organic Coatings to used test methods are listed in 5.1.1 through 5.1.4.
5.1.1 Impact Resistance—Test Method D 2794.
the Effects of Rapid Deformation (Impact)
D 3023 Practice for Determination of Resistance of 5.1.2 Film Hardness—Test Method D 3363.
5.1.3 Solvent Rub Test—Hold a pad of cheesecloth or other
Factory-Applied Coatings on Wood Products to Stains and
Reagents cloth saturated with an agreed-upon solvent, usually methyl
ethyl ketone, over two adjacent fingers using a protective
D 3281 Test Method for Formability of Attached Organic
Coatings with Impact-Wedge Bend Apparatus covering. Rub the wet pad back and forth across a 100-mm
portion of the cured film using vigorous pressure, one forward
D 3359 Test Methods for Measuring Adhesion by Tape
Test andonebackwardmovementconstitutingonedoublerub.Take
the end point as the number of double rubs required to soften
D 3363 Test Method for Film Hardness by Pencil Test
orpenetratethefilm.Fullycuredfilmsarenormallyrequiredto
resist a spe
...

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5.1 As the brush drag of a paint increases, any natural tendency on the part of the painter to overspread the paint is reduced. When all other factors are held constant, increased brush drag will result in greater film thickness with consequent improvement in durability and hiding. Conversely, sometimes it might be preferred to have a lesser degree of brush drag for easier application (that is, the amount of time and effort in applying a paint to a specific area is reduced with a lesser degree of brush drag).  
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SCOPE
1.1 This test method is a standardized brushout procedure for comparing the brush drag of architectural type solvent-borne paints.  
1.2 With slight modifications this test method is also applicable to solvent-borne paints.  
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5.1 Coatings attached to substrates are subjected to damaging impacts during the manufacture of articles and their use in service. In its use over many years, this test method for impact resistance has been found to be useful in predicting the performance of organic coatings for their ability to resist cracking caused by impacts.
SCOPE
1.1 This test method covers a procedure for rapidly deforming by impact a coating film and its substrate and for evaluating the effect of such deformation.  
1.2 This test method should be restricted to testing in only one laboratory when numerical values are used because of the poor reproducibility of the method. Interlaboratory agreement is improved when ranking is used in place of numerical values.  
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.4 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.  
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