ASTM D2793-99(2017)
(Test Method)Standard Test Method for Block Resistance of Organic Coatings on Wood Panel Substrates
Standard Test Method for Block Resistance of Organic Coatings on Wood Panel Substrates
SIGNIFICANCE AND USE
4.1 Coated wood panel products must be stacked face to face or face to back during warehousing, packaging, and transportation without the coated finish sticking (blocking) and becoming damaged. This test method describes a laboratory means of evaluating conditions of blocking using factors of pressure, heat, time and moisture.
4.2 Degrees of hardness or degrees of cure of organic coatings, or both, can be evaluated using a blocking test.
4.3 The rate of volatile loss (drying speed) of organic coatings can be evaluated using a blocking test.
4.4 The effectiveness of protective packaging materials (slip sheets) for organic coatings on wood substrates can be evaluated using a blocking test.
SCOPE
1.1 This test method covers the determination of the block resistance of organic coatings on wood and wood-based panel substrates. Block resistance is the ability of a coating to resist sticking to another surface and to resist any change in appearance when it is pressed against that surface for a prolonged period of time.
1.2 General methods for determining block resistance are outlined in Sections 6 and 7. Variations inherent in user materials and procedures, however, may dictate adjustments to the general method to improve accuracy. Paragraphs 7.3 and 7.4 provide guidelines for tailoring the general procedure to a user's specific application. Paragraph 7.5 offers a rating methodology.
1.3 Test Method D2091 should be used for the determination of print resistance or pressure mottling of organic coatings, particularly lacquers, applied to wood-based case goods such as furniture.
1.4 The values stated in SI 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.
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.
General Information
Relations
Standards Content (Sample)
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: D2793 − 99 (Reapproved 2017)
Standard Test Method for
Block Resistance of Organic Coatings on Wood Panel
1
Substrates
This standard is issued under the fixed designation D2793; 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 2. Referenced Documents
2
2.1 ASTM Standards:
1.1 This test method covers the determination of the block
D2091 Test Method for Print Resistance of Lacquers
resistance of organic coatings on wood and wood-based panel
substrates. Block resistance is the ability of a coating to resist
3. Summary of Test Method
sticking to another surface and to resist any change in
3.1 The coatings are prepared for testing in a manner
appearance when it is pressed against that surface for a
duplicating production application and curing conditions as
prolonged period of time.
nearlyaspossibleonthespecifiedwoodsubstrate.Thenastack
1.2 General methods for determining block resistance are
of these painted substrates is formed and subjected to a
outlined in Sections 6 and 7. Variations inherent in user
specified pressure and temperature for a sufficient time to
materials and procedures, however, may dictate adjustments to
develop any sticking tendencies that exist. The pressure is
the general method to improve accuracy. Paragraphs 7.3 and
released and the painted surfaces are examined for any signs of
7.4 provide guidelines for tailoring the general procedure to a sticking or pressure mottling. If blocking (forming a block by
user’s specific application. Paragraph 7.5 offers a rating meth-
panels sticking together) occurs, the material is unsatisfactory.
odology. If no sticking or damage to the film surface occurs, the material
is satisfactory.
1.3 Test Method D2091 should be used for the determina-
3.2 When the conditions of production finishing are estab-
tionofprintresistanceorpressuremottlingoforganiccoatings,
lishedandknown,themethodofapplication,thesubstrate,film
particularly lacquers, applied to wood-based case goods such
thickness, and cure of the film should duplicate these condi-
as furniture.
tions as closely as possible. However, some acceleration of the
1.4 The values stated in SI units are to be regarded as the
test may be possible with more severe conditions.
standard. The values given in parentheses are for information
4. Significance and Use
only.
4.1 Coated wood panel products must be stacked face to
1.5 This standard does not purport to address all of the
face or face to back during warehousing, packaging, and
safety concerns, if any, associated with its use. It is the
transportation without the coated finish sticking (blocking) and
responsibility of the user of this standard to establish appro-
becoming damaged. This test method describes a laboratory
priate safety and health practices and determine the applica-
means of evaluating conditions of blocking using factors of
bility of regulatory limitations prior to use.
pressure, heat, time and moisture.
1.6 This international standard was developed in accor-
4.2 Degrees of hardness or degrees of cure of organic
dance with internationally recognized principles on standard-
coatings, or both, can be evaluated using a blocking test.
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom- 4.3 The rate of volatile loss (drying speed) of organic
mendations issued by the World Trade Organization Technical coatings can be evaluated using a blocking test.
Barriers to Trade (TBT) Committee.
4.4 The effectiveness of protective packaging materials (slip
sheets) for organic coatings on wood substrates can be evalu-
ated using a blocking test.
1
This test method is under the jurisdiction of ASTM Committee D01 on Paint
and Related Coatings, Materials, andApplications and is the direct responsibility of
2
Subcommittee D01.52 on Factory Coated Wood Products. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved July 1, 2017. Published July 2017. Originally approved contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
in 1969. Last previous edition approved in 2011 as D2793 – 99 (2011). DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/D2793-99R17. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ------
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.