1、Designation:D242390(Reapproved 2017)Standard Test Method forSurface Wax on Waxed Paper or Paperboard1This standard is issued under the fixed designation D2423;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.
2、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 on the surface of waxed paper.1.2 The values stated in SI units are to be regar
3、ded asstandard.No other units of measurement are included in thisstandard.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 th
4、e applica-bility of regulatory limitations prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issu
5、ed by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D585 Practice for Sampling and Accepting a Single Lot ofPaper,Paperboard,Fiberboard,and Related Product(Withdrawn 2010)3D646 Test Method for Mass Per Unit Area of Paper andPaperboard
6、 of Aramid Papers(Basis Weight)3.Terminology3.1 Definitions:3.1.1 basis weight of paper,nbasis weight is expressed ingrams per square metre.In countries where the metric systemis not universal,basis weight is also expressed in pounds perream.3.1.2 ream of paper(news and wrapping),n500 sheetseach 610
7、 mm by 914 mm(24 in.by 36 in.).3.1.2.1 DiscussionFor factors to convert basis weight ingrams per square metre to other commercial reams,see TestMethod D646.4.Summary of Test Method4.1 The quantity of wax present as a surface film on paperor paperboard is determined through the difference in weight o
8、fspecimens before and after scraping with a razor blade.5.Significance and Use5.1 Many of the functional properties of waxed paper andpaperboard are related to the amount of wax present as asurface film.Test methods which determine wax load bysolvent extraction do not differentiate between the wax p
9、resentas a surface wax layer and that which has penetrated into thesubstrate.This test method,which mechanically removes thewax,measures the amount on each surface of the substrate.6.Apparatus6.1 Pad of paper to be used as a cushion under the waxedpaper specimens during the scraping operation.6.2 An
10、alytical Balance,capable of reproducing weights tothe nearest 0.001 g.6.3 Razor Blade,single-edged for scraping the wax from thespecimen.6.4 Trimming Board,or other device for cutting paperspecimens.A paper cutter having an attachment for ensuringparallelism of the opposite edge of the trimmed sheet
11、,or atemplate,or a die cutter is recommended.6.5 Measuring Device,capable of measuring the size of thespecimen to an accuracy 0.5 mm.7.Sampling7.1 Select samples that are free of wrinkles,cuts,or otherdefects in accordance with Practice D585.8.Procedure8.1 Prepare a specimen consisting of a 100 mm b
12、y 100 mmsquare of waxed paper.Determine the area(in square millime-tres)of each specimen to the nearest 1.0%of its total area.1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.10.0A o
13、n Physical/Chemical Properties.Current edition approved June 1,2017.Published July 2017.Originally approvedin 1965.Last previous edition approved in 2012 as D2423 90(2012)1.DOI:10.1520/D2423-90R17.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at s
14、erviceastm.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 1
15、9428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Techn
16、ical Barriers to Trade(TBT)Committee.1 8.2 Weigh the specimen on the analytical balance to thenearest 0.5%of its total weight.8.3 Remove the surface wax from one side of the specimen(side No.1)by scraping toward each of its four edges asfollows:Hold the specimen firmly on the pad to preventslippage.With a razor blade held vertically,scrape the entirearea of one side of the specimen with repeated one-directionalstrokes of the blade,slightly overlapping the strokes.Rotate thespecimen through 90 an
