ASTM D784-08
(Specification)Standard Specification for Orange Shellac and Other Indian Lacs for Electrical Insulation (Withdrawn 2013)
Standard Specification for Orange Shellac and Other Indian Lacs for Electrical Insulation (Withdrawn 2013)
ABSTRACT
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 splitting and reconstituted mica paper and as coating for other materials, as follows: type I - orange flake shellac, grades A, B, C, and D; type II - button lac; and type III garnet lac. The material shall conform to the requirements prescribed.
SCOPE
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.
WITHDRAWN RATIONALE
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under the jurisdiction of Committee D09 on Electrical and Electronic Insulating Materials, this test method was withdrawn in November 2013. This standard is being withdrawn without replacement because the products referenced in this standard are no longer used in the electrical industry.
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D784 −08 AnAmerican National Standard
Standard Specification for
Orange Shellac and Other Indian Lacs for Electrical
1
Insulation
This standard is issued under the fixed designation D784; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* 56–2 Shellac—Specifications—Part 2: Machine-Made Shel-
4
lac
1.1 This specification covers the requirements and methods
of test for three types and four grades of orange shellac and
3. Terminology
other lacs, typically used as bonding agents for mica splittings
3.1 Definitions—For definitions of terms used in this
andreconstitutedmicapaperandascoatingforothermaterials,
specification, refer to Terminology D1711.
as follows:
1.1.1 Type I—Orange Flake Shellac, GradesA, B, C, and D,
4. Ordering Information
1.1.2 Type II—Button Lac, and
1.1.3 Type III—Garnet Lac.
4.1 Orders for material covered by this specification shall
include the following:
1.2 Stick-lac and seed-lac are not covered by this specifica-
tion.
4.2 Lot number and supplier’s designation,
NOTE1—ISOSpecifications56–1and56–2covershellac.However,the
4.3 Type and grade,
equivalency of the ISO specification to this standard is unknown. Refer
directly to the ISO standards to determine equivalency.
4.4 Quantity in each bag or container, and
1.3 The values stated in SI units are to be regarded as
4.5 Total quantity.
standard. The values given in parentheses are mathematical
conversions to inch-pound units that are provided for informa-
5. Description of Materials
tion only and are not considered standard.
5.1 Type I is the commercial rosin-free grade of orange
flake shellac.Type II customarily occurs in the form of circular
2. Referenced Documents
1
disks about 76 mm (3 in.) in diameter and 3 mm ( ⁄8 in.) in
2
2.1 ASTM Standards:
thickness and is known to the trade as pure button lac. Type III
D29 Test Methods for Sampling and Testing Lac Resins
is dark garnet in color and is known to the trade as pure garnet
3
(Withdrawn 2005)
lac. Garnet lac is manufactured in admixture with rosin and as
D411 Test Methods for Shellac Used for Electrical Insula-
a dewaxed lac.The admixture and dewaxed lac are not covered
tion
by this specification.
D1711 Terminology Relating to Electrical Insulation
2.2 ISO Standards:
6. Properties
4
56–1 Shellac—Specifications—Part 1: Hand-Made Shellac
6.1 The material shall conform to the requirements pre-
scribed in Table 1.
1
This specification is under the jurisdiction of ASTM Committee D09 on
7. Test Methods
Electrical and Electronic Insulating Materials and is the direct responsibility of
Subcommittee D09.01 on Electrical Insulating Varnishes, Powders and Encapsulat-
7.1 Determine the material sampled and the properties
ing Compounds.
enumerated in this specification in accordance with Test
Current edition approved May 1, 2008. Published June 2008. Originally
Methods D29 and D411.
approved in 1961. Last previous edition approved in 2003 as D784 – 03. DOI:
10.1520/D0784-08.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
8. Certification
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
8.1 When specified in the purchase order or contract, a
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
producer’s or supplier’s certification s
...
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