ASTM F925-13(R2020) pdf free download

ASTM F925-13(R2020) pdf free download.Standard Test Method for Resistance to Chemicals of Resilient Flooring
1. Scope
1.1 This test method provides a procedure for determining the resistance ofresilient floor covering to surface deterioration when exposed to various chemical reagents. This test method is not intended as a staining test nor as a method to judge surface and appearance restoration of the sample after exposure to the chemical reagent. 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 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 of regulatory limitations prior to use. Specific hazard information is provided in Section 6 ofthis test method. 1.4 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.
4. Significance and Use
4.1 Resilient flooring products are designed and formulated to have good resistance to most common chemicals encoun- tered in typical use. High performance wear layers can also be used to enhance cleanability and chemical resistance. Resilient flooring used in residential and commercial environments may be subjected to a variety of chemicals through accidental spillage or as ingredients used for hygienic purposes. Perfor- mance is dependent upon the flooring formulation and that of the maintenance products used on the flooring. This test method provides a means of estimating the relative suscepti- bility of resilient floor covering to change when exposed to chemical reagents.
6. Hazards
6.1 A new medicine dropper or pipette should be used for each test reagent. If the same reagent dispenser apparatus is to be reused, it shall be thoroughly cleaned in hot soapy water and alcohol, or both, prior to applying each different test reagent. 6.2 Check to be sure the colorimeter is properly warmed up and calibrated prior to use. 6.3 Be sure specimens are held flat when measuring color. 6.4 Be sure each specimen is marked in the corner on the back for easy identification. 6.5 Dispose of chemical test reagents properly. Refer to Material Safety Data Sheets (MSDS) or precautions on the label for proper disposal. (Warning—Observe all necessary precautions when handling test reagents known to be flam- mable or potentially hazardous.)
7. Test Specimen
7.1 The specimen shall consist ofa portion ofthe test unit at least 6 by 6 in. (153.4 by 153.4 mm) for each reagent (chemical) to be tested. 7.2 Specimens shall be selected with minimal changes in surface texture. 7.3 Specimens should be of a color to show potential effect of reagent.
8. Procedure
8.1 Unless otherwise specified, condition the specimens and the test reagents (chemicals) for at least 24 h prior to testing. The environment for conditioning and testing is 73.4 6 3.6°F (23 6 2°C) and 50 6 5 % relative humidity. 8.2 Lay the specimens face up on a firm, flat surface. 8.3 Select a test area on the specimen having the flattest area and color appropriate to show the effect of the reagent and draw a square approximately 1 1 ⁄ 2 by 1 1 ⁄ 2 in. (38 by 38 mm) centered on that desired test location. 8.4 If using test equipment such as an indentation tester, thickness tester or color spectrophotometer to help quantify specimen change, take initial readings on the unexposed specimen and record values as indicated in Fig. 1. All mea- surements should be taken on a relatively flat spot, correspond- ing as closely as possible to the center of the test square. 8.5 When evaluating multiple product samples for resis- tance to chemicals, test in stages to permit sufficient time for cleaning and observing panels. Record results on Fig. 2. 8.6 For testing liquid reagents, center a piece of filter paper within the test square, using a medicine dropper or pipette, deposit 6–8 drops of test reagent or a sufficient amount to thoroughly wet the filter paper. 8.7 If the test reagent is a paste, apply a thin layer (approximately 1 ⁄ 16 in. (1.6 mm) thick) directly to the test area. Use a spatula or other convenient means. 8.8 Place a watch glass cover over the reagent and allow the test reagent to remain in contact with the test area for 60 6 1 min.