ASTM_D_2091_-_96_2011.pdf

Designation:D209196(Reapproved 2011)Standard Test Method forPrint Resistance of Lacquers1This standard is issued under the fixed designation D2091;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.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 This test method covers the resistance of dried lacquerfilms to imprinting.1.2 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D823 Practices for Producing Films of Uniform Thicknessof Paint,Varnish,and Related Products on Test PanelsD1005 Test Method for Measurement of Dry-Film Thick-ness of Organic Coatings Using MicrometersD1186 Test Methods for Nondestructive Measurement ofDry Film Thickness of Nonmagnetic Coatings Applied toa Ferrous Base(Withdrawn 2006)3D1400 Test Method for Nondestructive Measurement of DryFilm Thickness of Nonconductive Coatings Applied to aNonferrous Metal Base(Withdrawn 2006)3D5235 Test Method for Microscopical Measurement of DryFilm Thickness of Coatings on Wood Products2.2 U.S.Federal Specifications:4CCC-C-419(f)Cloth,Duck,Cotton,Unbleached,PliedCCC-C-440(e)Cloth,Cheesecloth,Bleached and Un-bleached3.Summary of Test Method3.1 A weight presses a piece of fabric against the testsurface.The surface is then examined and changes in appear-ance of the test surface are reported.4.Significance and Use4.1 An unsatisfactory appearance can result from pressuredeformation of a film inherently too soft or containing residualsolvent.This test method is primarily used to evaluate theresistance of a lacquer finish to printing under the conditions ofpackaging,shipping,and warehousing.5.Apparatus and Materials5.1 Test PanelsAplane surface consisting of wood,metal,paper supported on plate glass,plastic,or other surface with anarea at least 100%greater than the base of the weight.Theplaneness,smoothness,and composition should be agreedupon by the purchaser and the seller.5.2 Imprinting Fabric,8-oz Army duck,Type III,conform-ing to Fed.Spec.CCC-C-419(f)or cheesecloth,Type I,conforming to Federal Specification CCC-C-440(e).NOTE1With the cheesecloth only,use a pad of nonwoven felt clothat least 1.3 mm(0.05 in.)thick,weighing 0.24 kg/m2(7 oz/yd2)and largerthan the plane end of the weight.5.3 Weights,consisting of metal cylinders cut from standardstock 51 mm(2 in.)in diameter,with plane ends perpendicularto the axis,and of a length to give a pressure of 3.5 or 7.0 kPa(12or 1 lb/in.2).5.4 Automatic Application Equipment,(Optional),as de-scribed in Practices D823.5.5 Film Thickness Measuring Apparatus,as described inTest Methods D1005,D1186,D1400,and D5235.6.Preparation of Test Specimen6.1 Single CoatsPrepare a specimen for test by applyingthe test lacquer to a panel with a film applicator or otherspecified method,as described in Practices D823,to give a1This test method is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.52 on Factory Coated Wood Products.Current edition approved Nov.1,2011.Published November 2011.Originallyapproved in 1962.Last previous edition approved in 2003 as D2091 96(2003).DOI:10.1520/D2091-96R11.2For 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.4Available from Standardization Documents Order Desk,DODSSP,Bldg.4,SectionD,700RobbinsAve.,Philadelphia,PA19111-5098,http:/dodssp.daps.dla.mil.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 specified film thickness to be stated in the result.In the absenceof a specified dry film thickness,25 6 3 m(1 6 0.1 mil)isrecommended.6.2 Multiple CoatsUse the finish system as agreed uponbetween the purchaser and the seller.In the absence of aspecified dry film thickness,75 6 8 m(3 6 0.3 mils)arerecommended.6.3 ConditioningAllow to dry as agreed upon between thepurchaser and the seller,but run the test within 48 h aftercoating.In the absence of a specified drying schedule,a periodof 24 h at 23 6 2C(73.5 6 3.5F)and a relative humidity of50 6 5%is recommended.7.Procedure7.1 Place over a uniform area of the specim