1、Designation:D 784 03An American National StandardStandard Specification forOrange Shellac and Other Indian Lacs for ElectricalInsulation1This standard is issued under the fixed designation D 784;the number immediately following the designation indicates the year oforiginal adoption or,in the case of
2、 revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon(e)indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers the requirements and methodsof test for three types and four grades of ora
3、nge shellac andother lacs,typically used as bonding agents for mica splittingsand reconstituted mica paper and as coating for other materials,as follows:1.1.1 Type IOrange Flake Shellac,GradesA,B,C,and D,1.1.2 Type IIButton Lac,and1.1.3 Type IIIGarnet Lac.1.2 Stick-lac and seed-lac are not covered b
4、y this specifica-tion.NOTE1ISO Specifications 561 and 562 cover shellac.However,the equivalency of the ISO specification to this standard is unknown.Direct reference to the ISO standards may be made if it is necessary todetermine equivalency.2.Referenced Documents2.1 ASTM Standards:2D 29 Test Method
5、s for Sampling and Testing Lac ResinsD 411 Test Methods for Shellac Used for Electrical Insula-tionD 1711 Terminology Relating to Electrical Insulation2.2ISO Standards:561 ShellacSpecificationsPart 1:Hand-Made Shellac3562 ShellacSpecificationsPart 2:Machine-MadeShellac33.Terminology3.1 DefinitionsFo
6、r definitions of terms used in this speci-fication,refer to Terminology D 1711.4.Ordering Information4.1 Orders for material covered by this specification shallinclude the following:4.2 Lot number and suppliers designation,4.3 Type and grade,4.4 Quantity in each bag or container,and4.5 Total quantit
7、y.5.Description of Materials5.1 Type I is the commercial rosin-free grade of orangeflake shellac.Type II customarily occurs in the form of circulardisks about 76 mm(3 in.)in diameter and 3 mm(18in.)inthickness and is known to the trade as pure button lac.Type IIIis dark garnet in color and is known
8、to the trade as pure garnetlac.Garnet lac is manufactured in admixture with rosin and asa dewaxed lac.The admixture and dewaxed lac are not coveredby this specification.6.Properties6.1 The material shall conform to the requirements pre-scribed in Table 1.7.Test Methods7.1 Determine the material samp
9、led and the propertiesenumerated in this specification in accordance with TestMethods D 29 and D 411.8.Certification8.1 When specified in the purchase order or contract,aproducers or suppliers certification shall be furnished to thepurchaser that the material complies with the requirements ofthis sp
10、ecification.A report of the test results shall be furnishedwhen specified in the purchase order or contract.9.Packaging and Package Marking9.1 Packaging and marking shall be as agreed upon betweenthe purchaser and the supplier.10.Keywords10.1 bonded mica paper;bonded mica splittings;button lac;garne
11、t lac;lac;orange flake shellac1This specification is under the jurisdiction of ASTM Committee D09 onElectrical and Electronic Insulating Materials and is the direct responsibility ofSubcommittee D09.01 on Electrical Insulating Varnishes,Powders,and Encapsu-lating Compounds.Current edition approved D
12、ec.1,2003.Published January 2004.Originallyapproved in 1961.Last previous edition approved in 1999 as D 784 99.2For 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 standa
13、rds Document Summary page onthe ASTM website.3Available fromAmerican National StandardsAssociation,11 W.42nd St.,NewYork,NY 10036.1Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.ASTM International takes no position respecting the validity
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15、revision at any time by the responsible technical committee and must be reviewed every five years andif not revised,either reapproved or withdrawn.Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters.Your
16、 comments will receive careful consideration at a meeting of theresponsible technical committee,which you may attend.If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards,at the address shown below.This standard is copyrighted by ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.Individual reprints(single or multiple copies)of this standard may be obtained by contacting A
