ASTM D6840-02 (R2021) pdf free download.Standard Test Method for Effect of Drycleaning on Buttons.
1.1 This test method is a means of determining the effect of drycleaning on certain physical attributes of buttons. The test method applies to buttons made from plastics. natural materials, cast metal, stamped metal, and electroplated plastic.
1.1.1 The observed attributes of buttons made from plastic and natural materials include: color change. color transfer, solubility, swelling, and loss of finish.
1.1.2 The observed attributes of buttons made of metal and electroplated buttons include: color change, oxidation, and color transfer.
3. Terminology
3. 1 Definitions—For definitions of terms used in this test method, refer to Terminologies D 123, D5497, and D3 136.
4. Summary of Test Method
4.1 Specimens are sewn onto fabric and subjected to commercial dry cleaning. The dry cleaned specimens are measured and visually compared to an original specimen.
5. Significance and Use
5.1 This test method is useful for determining the change to the listed properties (see 1.1.1 and 1.1.2) and if the changes are acceptable for the intended use. This test may be used for acceptance testing of commercial shipments of buttons.
5.2 If there are differences of practical significance between the reported test results for two laboratories (or more), comparative tests should be performed to determine if there is a statistical bias between them. As a minimum, test samples should be used that are as homogeneous as possible. that are drawn from the material from which the disparate test results were obtained, and that are randomly assigned in equal numbers to each laboratory for testing. The test results for the two laboratories should be compared using a statistical test for unpaired data, at a probability level chosen prior to the testing series. If a bias is found, either its cause must be found and corrected, or future test results for that material must be adjusted in consideration of the known bias.
6. Apparatus
6. 1 The drycleaning apparatus shall be as specified in Test Method D2724.
6.2 AATCC Multifiber Test Fabric No. 10 or FA.
6.3 Undved Cotton Twill Cloth, weighing 270 g/m ± 70 g/m (0.6 1b/yd ± 0.15 lb/yd).
6.4 Measuring Device—A set of measuring calipers or micrometer is required to determine the dimensions of the buttons before and after testing.
7. Sampling, Test Specimcns and rfeSt tinits
7. 1 Laboratory Sample—Randomly select approximately 100 samples. from the same carton and from boxes within that carton, that adequately represent the material from which test specimens may be chosen.ASTM D6840 pdf download.