ASTM_D_3265_-_17e1.pdf

Designation:D3265171Standard Test Method forCarbon BlackTint Strength1This standard is issued under the fixed designation D3265;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.1NOTEEditorially corrected footnote 15 in August 2017.1.Scope1.1 This test method covers the determination of the tintstrength of carbon black relative to an industry tint referenceblack(ITRB).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,health and environmental practices and deter-mine the applicability 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 issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D1799 Practice for Carbon BlackSampling PackagedShipmentsD1900 Practice for Carbon BlackSampling Bulk Ship-mentsD4483 Practice for Evaluating Precision for Test MethodStandards in the Rubber and Carbon Black ManufacturingIndustriesD4821 Guide for Carbon BlackValidation of Test MethodPrecision and Bias3.Summary of Test Method3.1 A carbon black sample is mixed with a white powder(zinc oxide)and a liquid vehicle(epoxidized soybean oil,ESO)to produce a black or gray paste.This paste is then spread toproduce a surface suitable for measuring the reflectance of themixture by means of a photo-electric reflectance meter.Thereflectance of the tested sample is then compared to thereflectance of the ITRB prepared in the same manner.The tintstrength of the tested sample is expressed as units of thereflectance of the ITRB divided by the reflectance of thesample and multiplied by 100.3.2 Correction Factor:3.2.1 When ITRB-2,Paraplex G-62(made before June2012)and ZnO lot#8 are used,apply a correction factor of1.0134 for the calibration and standardization in Section 8.3.2.2 There should be no correction applied when ITRB isused with Paraplex G-62 and ZnO Lot#8 or earlier,that is,thecorrection factor is“1”.3.2.3 There should be no correction applied in the calcula-tion in Section 10 when using the currently available tint rawmaterials(see Section 6)for pastes prepared with either ITRBor ITRB2,that is,the correction factor is“1”.34.Significance and Use4.1 For the broad range of commercial rubber grade carbonblacks,tint strength is highly dependent upon particle size.Tintstrength can be used as an indication of particle size;however,tint strength is also dependent on structure and aggregate size1This test method is under the jurisdiction of ASTM Committee D24 on CarbonBlack and is the direct responsibility of Subcommittee D24.21 on Carbon BlackSurface Area and Related Properties.Current edition approved May 1,2017.Published May 2017.Originallyapproved in 1973.Last previous edition approved in 2015 as D3265 15a.DOI:10.1520/D3265-17E01.2For 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.3In 2013 issues were reported when using Paraplex G-62 purchased after June2012 and ZnO Lot#10.An ASTM task group investigated the issues and found thefollowing raw materials acceptable for Tint testing:1)ESO:Paraplex G-62 purchased before June 2012 or currently availableGreenChem Greenflex 7170,lot 590911X24,and2)zinc oxide Lot#8 or earlier,and currently available ZnO lot#11.It is highly recommended to only use these raw materials identified as acceptableas other sources may lead to unacceptable differences in the test results.The tint taskgroup has determined that Paraplex G-62 with lot numbers that begin with the digit5 and zinc oxide lots 9 and 10 are suspect and may not give acceptable results.When using the new raw materials for tint testing some differences may beobserved with various grades of carbon black compared with historical data.For thisreason it is the responsibility of the manufacturer to identify any such differences,and if necessary,revise any specifications between producer and user.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 Internationa