ASTM C681-2019 pdf free download
ASTM C681-2019 pdf free download.Standard Test Method for Volatility of Oil- and Resin-Based, Knife-Grade, Channel Glazing Compounds
1. Scope
1.1 This test method describes the determination of the volatility of oil- and resin-based, knife-grade, channel glazing compounds. 1.2 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. 1.3 The subcommittee with jurisdiction is not aware of any similar ISO 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 appro- priate safety, health, and environmental practices and deter- mine the applicability ofregulatory limitations prior to use. 1.5 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
3. Terminology
3.1 Definitions—Refer to Terminology C717 for definitions of the following terms: glazing, compound, channel, and standard conditions.
4. Summary of Test Method
4.1 The channel glazing compound is placed into a tared aluminum dish and weighed. The test specimen is then placed into an oven for a period of 3 h. After cooling, the test specimen is reweighed and the percent of volatile matter calculated.
5. Significance and Use
5.1 This test method provides a guide as to the amount of volatile matter that will be emitted from a channel glazing compound when tested by this test method.
6. Apparatus
6.1 Cabinet or Room, capable of maintaining standard conditions of temperature and relative humidity as defined in C717 for extended periods of time. 6.2 Forced-Draft Oven, capable of maintaining a tempera- ture of 220 6 5°F (104 6 3°C) for extended periods of time. 6.3 Dish, aluminum foil, 2.5 in. (64 mm) in diameter by 0.75 in. (19 mm) deep, with a flat bottom. 6.4 Balance, laboratory analytical type. 6.5 Steel Spatula or Putty Knife, with a blade about 4 in. (102 mm) long and 0.75 in. (19 mm) wide. 6.6 Desiccator.
7. Procedure
7.1 Condition a sample of channel glazing compound in a tightly closed container 24 h at standard conditions prior to testing. Mix the channel glazing compound thoroughly with a spatula to ensure uniformity of the sample to be tested. 7.2 Weigh the aluminum foil dish to the nearest 0.01 g and record the tare weight. 7.3 Transfer approximately 3 to 5 g of the compound into the tared aluminum foil dish, using the spatula, and spread the compound uniformly over the bottom of the dish. 7.4 Weigh the dish containing the compound quickly and accurately to the nearest 0.01 g. Record the combined weight of the dish and the compound. 7.5 Place the dish containing the compound into an oven controlled at 220 6 5°F (104 6 3°C) for a period of 3 h, cool in desiccator at standard conditions for 1 h, weigh accurately to the nearest 0.01 g, and record the weight of the dish plus the sample after heating.
