1、Designation:D36012(Reapproved 2019)Standard Specification forShellac Varnishes1This standard is issued under the fixed designation D360;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses
2、 indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers shellac varnish consisting of asolution or“cut”of a specified type and grade of dry lac resinin specially denatured alcohol.Ninety-fiv
3、e percent(190 proof)ethyl alcohol,specially denatured according to Formula No.1of theAlcohol,Tobacco,and Firearms of the Treasury Dept.,isthe solvent most commonly used.However,other speciallydenatured alcohols and proprietary solvents are also used forthis purpose.1.2 The values stated in inch-poun
4、d units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3 This international standard was developed in accor-dance with internationally recognized principles on standard-izat
5、ion established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D29 Test Methods for Sampling and Testing Lac Resins(Withd
6、rawn 2005)3D207 Specification for Dry Bleached Lac(Discontinued2000)(Withdrawn 2001)3D237 Specification for Orange Shellac and Other Lacs(Withdrawn 2006)33.Types,Grades,and Bodies3.1 This specification covers two grades,Aand B,of orangeshellac varnish and two grades,regular and refined,of bleachedla
7、c varnish.Each type and grade may be furnished in verylight,light,medium,heavy,very heavy,or extra heavy bodyvarnish,as specified.4.Color4.1 The color of shellac varnish shall be no darker than thecolor of a standard varnish of the same nonvolatile mattercontent mutually agreed upon between the purc
8、haser and theseller.NOTE1Attention is called to the fact that the purchaser and the sellermust agree upon one of the two methods for determining color appearingin Test Methods D29.5.Drying Time5.1 Shellac varnish shall dry hard in 1 h.Shellac varnisheshaving a body greater than that for a light body
9、 varnish shall bethinned to the nonvolatile matter content of a light bodyvarnish.Special conditions for this test may be made by mutualagreement between the purchaser and the seller.6.Body and Cut6.1 The body and cut of the respective types and gradesshall be based on the percent of nonvolatile mat
10、ter and shallconform to the following minimum requirements:Nonvolatile Matter,min,%Bleached,Orange,RegularGradesandA and BRefinedVery light body(3-lb(1.4-kg)cut)varnish28.528.0Light body(4-lb(1.8-kg)cut)varnish35.034.5Medium body(4.5-lb(2.0-kg)cut)varnish37.537.0Heavy body(5-lb(2.3-kg)cut)varnish40.
11、039.5Very heavy body(6-lb(2.7-kg)cut)varnish44.043.5Extra heavy body(8-lb(3.6-kg)cut)varnish51.050.5NOTE2The term“cut”is defined as the number of pounds of dry lacresin(containing only that amount of moisture acceptable for propercutting with the solvent to ensure a satisfactory varnish)that were ad
12、dedto 1 gal(3.8 L)of specified solvent in manufacturing the varnish.Allowance has,therefore,been made for 2%maximum moisture andother volatile matter and 3%insoluble matter in orange shellac,and for6%moisture and other volatile matter in bleached lac,in arriving at aminimum value.Varnishes of the ab
13、ove specified bodies or“cuts”should1This specification is under the jurisdiction of the ASTM Committee D01 onPaint and Related Coatings,Materials,and Applications and is the direct responsi-bility of Subcommittee D01.33 on Polymers and Resins.Current edition approved June 1,2019.Published June 2019.
14、Originallyapproved in 1933.Last previous edition approved in 2012 as D360 12.DOI:10.1520/D0360-12R19.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Docume
15、nt Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationa
16、lly recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 accordingly conform to the respective minimum requirements specifiedfor nonvolatile matter.7.Properties of Dry Lac7.1 The nonvolatile matter in the varnish shall conform tothe Properties section of Specification D207 and Table 1 ofSpecification D237.8.Packa
