ASTM_D_1814_-_70_2021.pdf

Designation:D181470(Reapproved 2021)Standard Test Method forMeasuring Thickness of Leather Units1This standard is issued under the fixed designation D1814;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 measurement of the thick-ness of units of all types of leather.It is not suitable formeasuring the thickness of test specimens.1.2 The thickness of leather units may be reported inmillimetres,ounces,or irons.Ounces are generally used whenreferring to the thickness of shoe upper leather.Irons aregenerally used when referring to the thickness of sole leather.(One ounce equals164in.or 0.0156 in.or 0.396 mm.One ironequals148in.or 0.0208 in.or 0.53 mm.)1.3 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.1.4 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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.5 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 issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D1813 Test Method for Measuring Thickness of LeatherTest Specimens3.Terminology3.1 Definitions:3.1.1 unita piece of leather in the form in which it ispurchased,such as a single hide,skin,or part thereof;or asingle fabricated-leather article in the form in which it ispurchased,such as a counter,a pair of shoes,a gasket,etc.4.Significance and Use4.1 This test method is designed for the routine measure-ment of the thickness of leather units as a means of productioncontrol and determining conformance to specifications.Itutilizes a secondary type of gage that is capable of rapidmeasurement.5.Specimen5.1 The specimen for measurement shall be the full unit.6.Apparatus6.1 Gage,Spring-Type,graduated in 0.1 mm or 0.5 oz,having a flat presser foot 0.4 6 0.025 in.(10.2 6 0.6 mm)indiameter and a flat anvil 0.4 6 0.025 in.(10.2 6 0.6 mm)indiameter.The spring shall exert a force of 1 lbf(4.45 N)on thefoot when the gage reads 2 oz,and 2 lbf(8.9 N)when the gagereads 12 oz.6.2 Gage,Standard Wedge-Type,having the two legs gradu-ated alternatively from 1 to 14 and from 112to 1312iron,enclosing an angle of about 4 and 0.425 6 0.005 mm thick,preferably made from stainless steel.7.Procedure7.1 Leather Other than Sole LeatherPlace the portion ofthe specimen to be measured between the anvil and presser footof the spring-type gage(6.1)in such a manner that thespecimen is in contact with the whole area of the anvil.Withthe specimen held in this position,compress the thumb lever ofthe gage so that the gage reads approximately 15 oz.Allow thethumb to slide off the lever so that the gage presser foot snapsonto the leather.Read the thickness to the nearest 0.1 mm orestimate it to the nearest14oz.Measure the thickness at notless than five approximately equally spaced places along andapproximately 6 in.(150 mm)from the backbone.Space the1This test method is under the jurisdiction of ASTM Committee D31 on Leatherand is the direct responsibility of Subcommittee D31.07 on Physical Properties.Thistest method was developed in cooperation with the American Leather ChemistsAssn.(Standard Method E31963).Current edition approved Sept.1,2021.Published October 2021.Originallyapproved in 1960.Last previous edition approved in 2015 as D181470(2015).DOI:10.1520/D1814-70R21.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.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 Technical Barriers to Trade(TBT)Committee.1measurements from an initial point of measurement approxi-mately 5 in.(130 mm)in from the root of the tail and the finalplace of measurement,which shall extend no farther than 130m