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Designation: D1712 − 09 (Reapproved 2026)Standard Practice forResistance of Plastics to Sulf i de Staining 1This standard is issued under the f i xed designation D1712; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (´) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This practice covers the determination of the resistanceof plastics to staining in the presence of sulf i des.1.2 The values stated in SI units are to be regarded as thestandard.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility 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.For specif i c precaution statements, see Section 6.N OTE 1—There is no known ISO equivalent to this standard.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards: 2D618 Practice for Conditioning Plastics for TestingD883 Terminology Relating to Plastics3. Terminology3.1 Def i nitions—For def i nitions of terms used in thispractice, refer to Terminology D883.4. Signif i cance and Use4.1 Plastic compositions containing salts of lead, cadmium,copper, antimony, and certain other metals (as stabilizers,pigments, driers, or f i llers) may stain due to the formation of ametallic sulf i de when in contact with external materials thatcontain sulf i de. The external sulf i de source may be liquid,solid, or gas. Examples of materials that may cause sulf i destains are rubber, industrial fumes, foods, kraft paper, etc. Thispractice provides a means of estimating the relative suscepti-bility of plastic composition to sulf i de staining.5. Reagent5.1 Hydrogen Sulf i de Solution—A freshly prepared satu-rated solution of hydrogen sulf i de (Caution, see Section 6).Prepare the solution by rapidly bubbling hydrogen sulf i de gas(Note 2) through water. Five minutes of bubbling is sufficientfor 100 to 150 mL of water at room temperature (approxi-mately 23°C).N OTE 2—Hydrogen sulf i de gas may be obtained commercially ascompressed gas in cylinders.6. Precautions6.1 Hydrogen sulf i de is a highly toxic gas and must behandled only in a suitably ventilated area such as a hood.Avoidbreathing of vapors.7. Sampling7.1 Sampling shall be in accordance with the pertinentmaterial specif i cation or as agreed to by customer and client.8. Test Specimens8.1 Test specimens shall be representative of the particularplastic composition being tested. Size and shape of testspecimens are relatively unimportant. Specimens 100 6 25mm (4 6 1 in.) in length by 13 6 6 mm (0.5 6 0.25 in.) inwidth by the thickness of the composition being tested, havebeen found suitable for this test.9. Conditioning9.1 Conditioning—Condition the test specimens at 23 62°C (73.4 6 3.6°F) and 50 6 10 % relative humidity for notless than 40 h prior to test in accordance with Procedure A ofPractice D618 for those tests where conditioning is required. Incases of disagreement, the tolerances shall be 61°C (61.8°F)and 65 % relative humidity.9.2 Test Conditions—Conduct tests in the standard labora-tory atmosphere of 23 6 2°C (73.4 6 3.6°F) and 50 6 10 %1 This practice is under the jurisdiction ofASTM Committee D20 on Plastics andis the direct responsibility of Subcommittee D20.50 on Durability of Plastics.Current edition approved July 1, 2026. Published July 2026. Originally approvedin 1960. Last previous edition approved in 2020 as D1712 – 09(2020). DOI:10.1520/D1712-09R26.2 For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at www.astm.org/contact. For Annual Book ofASTM Standards volume information, refer to the standard’s Document Summarypage on the ASTM website.*A Summary of Changes section appears at the end of this standardCopyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1