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ASTM

ASTM D360-12

(Specification)

Standard Specification for Shellac Varnishes

Standard Specification for Shellac Varnishes

ABSTRACT
This specification covers shellac varnish consisting of a solution of specific type of dry lac resin and denatured alcohol. This specification includes two grades, A and B, of orange shellac varnish and two grades, regular and refined, of bleached lac varnish. Varnish color, drying time, body and cut, packaging and marking, and test methods shall conform to the specification indicated.
SCOPE
1.1 This specification covers shellac varnish consisting of a solution or “cut” of a specified type and grade of dry lac resin in specially denatured alcohol. Ninety-five percent (190 proof) ethyl alcohol, specially denatured according to Formula No. 1 of the Alcohol, Tobacco, and Firearms of the Treasury Dept., is the solvent most commonly used. However, other specially denatured alcohols and proprietary solvents are also used for this purpose.  
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

General Information

Status
Historical
Publication Date
31-Oct-2012
ICS
29.035.60 - Varnished fabrics
Technical Committee
D01 - Paint and Related Coatings, Materials, and Applications
Drafting Committee
D01.33 - Polymers and Resins
Current Stage
Ref Project

Relations

Replaces
ASTM D360-89(2001) - Standard Specification for Shellac Varnishes (Withdrawn 2010)
Effective Date
01-Nov-2012
Replaced By
ASTM D360-12(2019) - Standard Specification for Shellac Varnishes
Effective Date
01-Jun-2019
Referred By
ASTM D4209-07(2019) - Standard Practice for Determining Volatile and Nonvolatile Content of Cellulosics, Emulsions, Resin Solutions, Shellac, and Varnishes
Effective Date
01-Nov-2012

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ASTM D360-12 - Standard Specification for Shellac VarnishesASTM D360-12 - Standard Specification for Shellac Varnishes
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ASTM D360-12 - Standard Specification for Shellac Varnishes
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D360 −12
Standard Specification for
1
Shellac Varnishes
This standard is issued under the fixed designation D360; 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 4. Color
1.1 This specification covers shellac varnish consisting of a 4.1 The color of shellac varnish shall be no darker than the
solution or “cut” of a specified type and grade of dry lac resin
color of a standard varnish of the same nonvolatile matter
in specially denatured alcohol. Ninety-five percent (190 proof) content mutually agreed upon between the purchaser and the
ethyl alcohol, specially denatured according to Formula No. 1 seller.
of theAlcohol,Tobacco, and Firearms of theTreasury Dept., is
NOTE 1—Attention is called to the fact that the purchaser and the seller
the solvent most commonly used. However, other specially
must agree upon one of the two methods for determining color appearing
denatured alcohols and proprietary solvents are also used for
in Test Methods D29.
this purpose.
5. Drying Time
1.2 The values stated in inch-pound units are to be regarded
as standard. The values given in parentheses are mathematical
5.1 Shellac varnish shall dry hard in 1 h. Shellac varnishes
conversions to SI units that are provided for information only
having a body greater than that for a light body varnish shall be
and are not considered standard.
thinned to the nonvolatile matter content of a light body
varnish.Specialconditionsforthistestmaybemadebymutual
2. Referenced Documents
agreement between the purchaser and the seller.
2
2.1 ASTM Standards:
6. Body and Cut
D29 Test Methods for Sampling and Testing Lac Resins
3
(Withdrawn 2005)
6.1 The body and cut of the respective types and grades
D207 Specification for Dry Bleached Lac (Discontinued
shall be based on the percent of nonvolatile matter and shall
3
2000) (Withdrawn 2001)
conform to the following minimum requirements:
D237 Specification for Orange Shellac and Other Lacs
Nonvolatile Matter, min,
3
(Withdrawn 2006)
%
Bleached,
Orange, Regular
3. Types, Grades, and Bodies
Grades and
A and B Refined
3.1 This specification covers two grades,Aand B, of orange
shellacvarnishandtwogrades,regularandrefined,ofbleached Very light body (3-lb (1.4-kg) cut) 28.5 28.0
varnish
lac varnish. Each type and grade may be furnished in very
Light body (4-lb (1.8-kg) cut) varnish 35.0 34.5
light, light, medium, heavy, very heavy, or extra heavy body
Medium body (4.5-lb (2.0-kg) cut) 37.5 37.0
varnish
varnish, as specified.
Heavy body (5-lb (2.3-kg) cut) varnish 40.0 39.5
Very heavy body (6-lb (2.7-kg) cut) 44.0 43.5
varnish
Extra heavy body (8-lb (3.6-kg) cut) 51.0 50.5
1
This specification is under the jurisdiction of the ASTM Committee D01 on
varnish
Paint and Related Coatings, Materials, and Applications and is the direct responsi-
bility of Subcommittee D01.33 on Polymers and Resins.
NOTE 2—The term “cut” is defined as the number of pounds of dry lac
Current edition approved Nov. 1, 2012. Published November 2012. Originally
r
...

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1.1 This specification covers shellac varnish consisting of a solution or “cut” of a specified type and grade of dry lac resin in specially denatured alcohol. Ninety-five percent (190 proof) ethyl alcohol, specially denatured according to Formula No. 1 of the Alcohol, Tobacco, and Firearms of the Treasury Dept., is the solvent most commonly used. However, other specially denatured alcohols and proprietary solvents are also used for this purpose.  
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4.1 Gel time is important in determining batch uniformity and some processing characteristics. It is indicative of pot life and shelf life.
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5.1 This test method is used to determine the effect of exposure to elevated temperatures on the bond strength of combinations of magnet wire insulations and electrical insulating varnishes. The results are used as a guide for the comparison and selection of varnishes and combinations of varnishes and magnet wire insulation for specific applications. Test Methods D1932 and D3251 describe additional tests for determining the thermal endurance of insulating varnishes. A comprehensive evaluation of thermal characteristics includes a comparison of the thermal endurance determined in these different ways.  
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This specification covers the tests and values for electrical insulating varnishes, as supplied, which are suitable for the impregnation and treatment of electrical coils and windings applied by dip process. The varnishes are classified according to grades: Grade DA; Grade DO; Grade DM; Grade DS; Grade DW; and Grade DT. This specification covers both flexible and rigid, solvent and solventless insulating varnishes. The insulating varnishes are classified according to thermal classes: Class 130; Class 155; Class 180; Class 200; and Class 220. Quality conformance tests shall be performed to conform to the specified requirements.
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