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ASTM D360-12(2019)

(Specification)

Standard Specification for Shellac Varnishes

Standard Specification for Shellac Varnishes

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.  
1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

Status
Published
Publication Date
31-May-2019
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 D360-12 - Standard Specification for Shellac Varnishes
Effective Date
01-Jun-2019
Refers
ASTM D29-98 - Standard Test Methods for Sampling and Testing Lac Resins (Withdrawn 2005)
Effective Date
10-Jun-1998
Refers
ASTM D237-57(1997) - Standard Specification for Orange Shellac and Other Lacs (Withdrawn 2006)
Effective Date
10-Jun-1997
Refers
ASTM D207-55(1995)e1 - Standard Specification for Dry Bleached Lac (Withdrawn 2000)
Effective Date
01-Jan-1995
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-Jun-2019

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ASTM D360-12(2019) - Standard Specification for Shellac VarnishesASTM D360-12(2019) - Standard Specification for Shellac Varnishes
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ASTM D360-12(2019) - Standard Specification for Shellac Varnishes
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D360 −12 (Reapproved 2019)
Standard Specification for
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 lac varnish. Each type and grade may be furnished in very
light, light, medium, heavy, very heavy, or extra heavy body
1.1 This specification covers shellac varnish consisting of a
varnish, as specified.
solution or “cut” of a specified type and grade of dry lac resin
in specially denatured alcohol. Ninety-five percent (190 proof)
4. Color
ethyl alcohol, specially denatured according to Formula No. 1
4.1 The color of shellac varnish shall be no darker than the
of theAlcohol,Tobacco, and Firearms of theTreasury Dept., is
color of a standard varnish of the same nonvolatile matter
the solvent most commonly used. However, other specially
content mutually agreed upon between the purchaser and the
denatured alcohols and proprietary solvents are also used for
seller.
this purpose.
NOTE 1—Attention is called to the fact that the purchaser and the seller
1.2 The values stated in inch-pound units are to be regarded
must agree upon one of the two methods for determining color appearing
as standard. The values given in parentheses are mathematical
in Test Methods D29.
conversions to SI units that are provided for information only
and are not considered standard.
5. Drying Time
1.3 This international standard was developed in accor-
5.1 Shellac varnish shall dry hard in 1 h. Shellac varnishes
dance with internationally recognized principles on standard-
having a body greater than that for a light body varnish shall be
ization established in the Decision on Principles for the
thinned to the nonvolatile matter content of a light body
Development of International Standards, Guides and Recom-
varnish.Specialconditionsforthistestmaybemadebymutual
mendations issued by the World Trade Organization Technical
agreement between the purchaser and the seller.
Barriers to Trade (TBT) Committee.
6. Body and Cut
2. Referenced Documents
6.1 The body and cut of the respective types and grades
2.1 ASTM Standards:
shall be based on the percent of nonvolatile matter and shall
D29 Test Methods for Sampling and Testing Lac Resins
conform to the following minimum requirements:
(Withdrawn 2005)
Nonvolatile Matter, min,
D207 Specification for Dry Bleached Lac (Discontinued %
Bleached,
2000) (Withdrawn 2001)
Orange, Regular
D237 Specification for Orange Shellac and Other Lacs
Grades and
(Withdrawn 2006) A and B Refined
Very light body (3-lb (1.4-kg) cut) 28.5 28.0
3. Types, Grades, and Bodies
varnish
Light body (4-lb (1.8-kg) cut) varnish 35.0 34.5
3.1 This specification covers two grades,Aand B, of orange
Medium body (4.5-lb (2.0-kg) cut) 37.5 37.0
shellacvarnishandtwogrades,regularandrefined,ofbleached
varnish
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
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-
Ex
...

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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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4.1 This test method determines the volatile organic content of an electrical insulating varnish. It utilizes a procedure where dishes containing a known amount of varnish are baked and the amount of volatile organic compound is measured. Calculations are performed to express this in g/L or lb/gal. This test method is applicable to all types of varnishes. However, waterborne varnishes while baked under the same conditions need to have water content determined and calculations performed in accordance with Practice D3960.  
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1.1 This test method covers the determination of the amount of volatile organic compounds emitted during cure of electrical insulating varnishes.  
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