ASTM_D_360_-_12.pdf

Designation:D36012Standard 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 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-five 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-pound 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not considered standard.2.Referenced Documents2.1 ASTM Standards:2D29 Test Methods for Sampling and Testing Lac Resins(Withdrawn 2005)3D207 Specification for Dry Bleached Lac(Discontinued2000)(Withdrawn 2001)3D237 Specification for Orange Shellac and Other Lacs(Withdrawn 2006)33.Types,Grades,and Bodies3.1 This specification covers two grades,Aand B,of orangeshellac varnish and two grades,regular and refined,of bleachedlac 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 purchaser 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 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 matter 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)varnish40.039.5Very 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 addedto 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 above specified bodies or“cuts”shouldaccordingly conform to the respective minimum requirements specifiedfor nonvolatile matter.1This 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 Nov.1,2012.Published November 2012.Originallyapproved in 1933.Last previous edition approved in 1996 as D360 89(1996)1which was withdrawn January 2010 and reinstated in November 2012.DOI:10.1520/D0360-12.2For 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 Document 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 States1 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.Package Marking8.1 Shellac varnish shall be packaged in standard commer-cial containers of the type and size mutually agreed uponbetween the purchaser and the seller.The label of the containershall show the type,grade,body or cut,and date of manufac-ture of the varnish contained therein.9.Test Methods9.1 The sampling and methods of testing shall be conductedin accordance with Test Methods D29.10.Keywords10.1 denatured alcohol;dry lac resin;orange shellac;shellacvarnishASTM International takes no position respecting the validity of any patent rights asserted in connection with an