ASTM D784-03

Standard Specification for Orange Shellac and Other Indian Lacs for Electrical Insulation

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. Direct reference to the ISO standards may be made if it is necessary to determine equivalency.

General Information

• Status: Historical
• Publication Date: 30-Nov-2003
• ICS: 29.035.60 - Varnished fabrics
• Technical Committee: D09 - Electrical and Electronic Insulating Materials
• Drafting Committee: D09.01 - Electrical Insulating Products

Relations

• Replaces: ASTM D784-99 - Standard Specification for Orange Shellac and Other Indian Lacs for Electrical Insulation
• Effective Date: 01-Dec-2003
• Replaced By: ASTM D784-08 - Standard Specification for Orange Shellac and Other Indian Lacs for Electrical Insulation (Withdrawn 2013)
• Effective Date: 01-May-2008

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
An American National Standard
Designation: D 784 – 03
Standard Specification for
Orange Shellac and Other Indian Lacs for Electrical
1
Insulation
This standard is issued under the fixed designation D 784; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 4. Ordering Information
1.1 This specification covers the requirements and methods 4.1 Orders for material covered by this specification shall
of test for three types and four grades of orange shellac and include the following:
other lacs, typically used as bonding agents for mica splittings 4.2 Lot number and supplier’s designation,
andreconstitutedmicapaperandascoatingforothermaterials, 4.3 Type and grade,
as follows: 4.4 Quantity in each bag or container, and
1.1.1 Type I—Orange Flake Shellac, GradesA, B, C, and D, 4.5 Total quantity.
1.1.2 Type II—Button Lac, and
5. Description of Materials
1.1.3 Type III—Garnet Lac.
1.2 Stick-lac and seed-lac are not covered by this specifica- 5.1 Type I is the commercial rosin-free grade of orange
flake shellac.Type II customarily occurs in the form of circular
tion.
1
disks about 76 mm (3 in.) in diameter and 3 mm ( ⁄8 in.) in
NOTE 1—ISO Specifications 56–1 and 56–2 cover shellac. However,
thickness and is known to the trade as pure button lac. Type III
the equivalency of the ISO specification to this standard is unknown.
is dark garnet in color and is known to the trade as pure garnet
Direct reference to the ISO standards may be made if it is necessary to
lac. Garnet lac is manufactured in admixture with rosin and as
determine equivalency.
adewaxedlac.Theadmixtureanddewaxedlacarenotcovered
2. Referenced Documents
by this specification.
2
2.1 ASTM Standards:
6. Properties
D 29 Test Methods for Sampling and Testing Lac Resins
D 411 Test Methods for Shellac Used for Electrical Insula- 6.1 The material shall conform to the requirements pre-
scribed in Table 1.
tion
D 1711 Terminology Relating to Electrical Insulation
7. Test Methods
2.2 ISO Standards:
3
7.1 Determine the material sampled and the properties
56–1 Shellac—Specifications—Part 1: Hand-Made Shellac
enumerated in this specification in accordance with Test
56–2 Shellac—Specifications—Part 2: Machine-Made
3
Methods D 29 and D 411.
Shellac
8. Certification
3. Terminology
8.1 When specified in the purchase order or contract, a
3.1 Definitions—For definitions of terms used in this speci-
producer’s or supplier’s certification shall be furnished to the
fication, refer to Terminology D 1711.
purchaser that the material complies with the requirements of
this specification.Areport of the test results shall be furnished
1
This specification is under the jurisdiction of ASTM Committee D09 on
when specified in the purchase order or contract.
Electrical and Electronic Insulating Materials and is the direct responsibility of
Subcommittee D09.01 on Electrical Insulating Varnishes, Powders, and Encapsu-
9. Packaging and Package Marking
lating Compoun
...