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This specification covers the requirements and methods of test for three types and four grades of orange shellac and other lacs, typically used as bonding agents for mica splittings and reconstituted mica paper and as coating for other materials.
Formerly under the jurisdiction of Committee D09 on Electrical and Electronic Insulating Materials, this test method was withdrawn in November 2013. This standard is being withdrawn without replacement because the products referenced in this standard are no longer used in the electrical industry.
1.1 This specification covers the requirements and methods of test for three types and four grades of orange shellac and other lacs, typically used as bonding agents for mica splittings and reconstituted mica paper and as coating for other materials, as follows:
1.1.1 Type I—Orange Flake Shellac, Grades A, B, C, and D,
1.1.2 Type II—Button Lac, and
1.1.3 Type III—Garnet Lac.
1.2 Stick-lac and seed-lac are not covered by this specification.
Note 1—ISO Specifications 56–1 and 56–2 cover shellac. However, the equivalency of the ISO specification to this standard is unknown. Refer directly to the ISO standards to determine equivalency.
1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to inch-pound units that are provided for information only and are not considered standard.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D29 Test Methods for Sampling and Testing Lac Resins
D411 Test Methods for Shellac Used for Electrical Insulation
D1711 Terminology Relating to Electrical Insulation
ISO Standards56–2 ShellacSpecificationsPart 2: Machine-Made Shellac
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ASTM D784-08, Standard Specification for Orange Shellac and Other Indian Lacs for Electrical Insulation (Withdrawn 2013), ASTM International, West Conshohocken, PA, 2008, www.astm.orgBack to Top