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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.
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 and . Variations inherent in user materials and procedures, however, may dictate adjustments to the general method to improve accuracy. Paragraphs and provide guidelines for tailoring the general procedure to a user's specific application. Paragraph offers a rating methodology.
1.3 Test Method 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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D2091 Test Method for Print Resistance of Lacquers
ICS Number Code 25.220.60 (Organic coatings)
UNSPSC Code 46181533(Protective coats)
|Link to Active (This link will always route to the current Active version of the standard.)|
ASTM D2793-99(2017), Standard Test Method for Block Resistance of Organic Coatings on Wood Panel Substrates, ASTM International, West Conshohocken, PA, 2017, www.astm.orgBack to Top