ASTM D784-99

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.

General Information

• Status: Historical
• Publication Date: 09-Mar-1999
• ICS: 29.035.60 - Varnished fabrics
• Technical Committee: D09 - Electrical and Electronic Insulating Materials
• Drafting Committee: D09.01 - Electrical Insulating Products

Relations

• Replaced By: ASTM D784-03 - Standard Specification for Orange Shellac and Other Indian Lacs for Electrical Insulation
• Effective Date: 01-Dec-2003

Standards Content (Sample)

NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
An American National Standard
Designation: D 784 – 99
Standard Specification for
Orange Shellac and Other Indian Lacs for Electrical
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 4.2 Lot number and supplier’s designation,
4.3 Type and grade,
1.1 This specification covers the requirements and methods
4.4 Quantity in each bag or container, and
of test for three types and four grades of orange shellac and
4.5 Total quantity.
other lacs, typically used as bonding agents for mica splittings
and reconstituted mica paper and as coating for other materials,
5. Description of Materials
as follows:
5.1 Type I is the commercial rosin-free grade of orange
1.1.1 Type I—Orange Flake Shellac, Grades A, B, C, and D,
flake shellac. Type II customarily occurs in the form of circular
1.1.2 Type II—Button Lac, and
disks about 76 mm (3 in.) in diameter and 3 mm ( ⁄8 in.) in
1.1.3 Type III—Garnet Lac.
thickness and is known to the trade as pure button lac. Type III
1.2 Stick-lac and seed-lac are not covered by this specifica-
is dark garnet in color and is known to the trade as pure garnet
tion.
lac. Garnet lac is also manufactured in admixture with rosin
NOTE 1—ISO Specifications 56–1 and 56–2 cover shellac. However,
and as a dewaxed lac, but these are not covered by this
the equivalency of the ISO specification to this standard is unknown.
specification.
Direct reference to the ISO standards may be made if it is necessary to
determine equivalency.
6. Properties
2. Referenced Documents 6.1 The material shall conform to the requirements pre-
scribed in Table 1.
2.1 ASTM Standards:
D 29 Test Methods for Sampling and Testing Lac Resins
7. Test Methods
D 411 Test Methods for Shellac Used for Electrical Insula-
3 7.1 Determine the material sampled and the properties
tion
3 enumerated in this specification in accordance with Test
D 1711 Terminology Relating to Electrical Insulation
Methods D 29 and D 411.
2.2 ISO Standards:
56–1 Shellac—Specifications—Part 1: Hand-Made Shellac
8. Certification
56–2 Shellac—Specifications—Part 2: Machine-Made
8.1 When specified in the purchase order or contract, a
Shellac
producer’s or supplier’s certification shall be furnished to the
purchaser that the material complies with the requirements of
3. Terminology
this specification. A report of the test results shall be furnished
3.1 Definitions—For definitions of terms used in this speci-
when specified in the purchase order or contract.
fication, refer to Terminology D 1711.
9. Packaging and Package Marking
4. Ordering Information
9.1 Packaging and marking shall be as agreed upon between
4.1 Orders for material covered by this specification shall
the purchaser and the supplier.
include the following:
10. Keywords
This specification is under the jurisdiction of ASTM Committee D-9 on
10.1 bonded mica paper; bonded mica splittings; button lac;
Electrical and Ele
...