ASTM_D_3521_-_86_2012.pdf

Designation:D352186(Reapproved 2012)Standard Test Method forSurface Wax Coating On Corrugated Board1This standard is issued under the fixed designation D3521;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 test method covers determination of the weight ofwax that is present as a coating on the surface of corrugatedboard.This method is applicable to board to which wax hasbeen applied by curtain coating,roll coating,or other methods;the substrate board may or may not contain impregnating(saturating)wax within its structure.NOTE1If it is known that the specimen has coating wax only,with nointernal saturating wax,the total coating wax applied may be determinedby Test Method D3344.1.2 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ASTM Standards:2D585 Practice for Sampling and Accepting a Single Lot ofPaper,Paperboard,Fiberboard,and Related Product(Withdrawn 2010)3D3344 Test Method for Total Wax Content of CorrugatedPaperboard3.Terminology3.1 Definitions:3.1.1 weight of wax coatingthe weight of wax present asa surface film on corrugated paperboard,expressed as weightper unit area,usually grams per square metre or pounds ofcoating per thousand feet of board covered.3.1.1.1 DiscussionThis definition excludes any portion ofwax that is located below the surface,that may have beenpermitted to soak into the fibrous paperboard structure.4.Summary of Test Method4.1 The amount of wax present as a coating on the surfaceis determined by delaminating the coated facing to obtain aripple-free sheet,then scraping off the wax using a razor bladeand calculating the wax removed.5.Significance and Use5.1 Wax coatings are applied to corrugated board to providea better barrier against moisture or other agents or to provideimproved appearance or abrasion resistance.These perfor-mance features are influenced by the amount of wax present onthe surface.5.2 During most coating operations,the major portion of thewax applied will congeal on the surface,while a minorproportion will migrate into and become embedded in thefibers of the facing.This method measures only the portion onthe surface.6.Apparatus6.1 Sample-Trimming EquipmentA suitable trimmingboard or template arrangement equipped with a razor edgeknife for even cutting of specimens to required size,withparallel sides.(A guillotine-type paper cutter is not recom-mended.)6.2 Measuring Rule,steel edged,for measuring the size ofspecimen to within 0.5 mm.6.3 Razor Blades,common single-edge,having a rigid rimfor holding in the fingers.The blade is used for surface waxscraping and an adequate supply of fresh blades with sharpedges is required.6.4 Analytical Balance,reading to nearest 1 mg.7.Sampling and Test Specimen7.1 From each test unit,obtained in accordance with Prac-tice D585,that is,each finished carton blank or paperboardsheet,cut specimens free from obvious defects.Each specimenshould measure 100 by 100 mm,cut to the nearest 0.5 mm.Record the area of the surface to be tested,and whether it is aninside or outside facing.Duplicate specimens are required fromeach sample unit.1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products and Lubricantsand is the direct responsibility of SubcommitteeD02.10.0A on Physical/Chemical Properties.Current edition approved Nov.1,2012.Published November 2012.Originallyapproved in 1976.Last previous edition approved in 2007 as D3521 86(2007).DOI:10.1520/D3521-86R12.2For 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 NOTE2The operator may be required to increase the replication andtreatment of specimens to obtain a better estimate of“average”waxloading,(1)if the waxing is at an extremely low level,or(2)if the waxloading shows obvious wide variations in distribution over the board area.NOTE3Optionally,specimens of other dimensions may be used ifrequired by sampling limitations.In such cases,calculations need to beappropriately adjusted.7.2 Condition all boards at 23C(73F)and 50%relativehumidity for a minimum of 48 h before beginning testprocedure.8.Procedure8.1 Take each duplicate specimen and separate the coatedfacing from the combined board as f