ASTM_F_1514_-_03_2013.pdf

Designation:F151403(Reapproved 2013)Standard Test Method forMeasuring Heat Stability of Resilient Flooring by ColorChange1This standard is issued under the fixed designation F1514;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 a procedure for determining theresistance of resilient floor covering to color change fromexposure to elevated temperature over a specified period oftime.1.2 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.1.3 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to use.2.Referenced Documents2.1 ASTM Standards:2D794 Practice for Determining Permanent Effect of Heat onPlastics(Withdrawn 1998)3D2244 Practice for Calculation of Color Tolerances andColor Differences from Instrumentally Measured ColorCoordinatesE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method3.Significance and Use3.1 Resilient floor covering is made by fusing polymermaterials under heat or pressure,or both,in various manufac-turing and decorating processes.The polymer material may becompounded with plasticizers,stabilizers,fillers,and otheringredients for processibility and product performance charac-teristics.The formulation of the compound can be variedconsiderably depending on the desired performance character-istics and methods of processing.See Practice D794 foradditional significance and use information.3.1.1 Heat stability,which is resistance to discolorationfrom heat,is a basic requirement for processing and functionaluse.3.1.2 This test method provides a means of measuring theamount of color change in flooring products when subjected toelevated temperatures over a period of time(functional use ofthe flooring product).3.2 This test method is not intended to be a means ofpredicting the amount of color change that occurs duringprocessing(manufacture).3.3 This test method specifies that a sample is subjected to158F 6 2F(70C 6 1C)for 7 days,and the color differenceis measured by a spectrophotometer and expressed as E*units.NOTE1It is the intent that this test method be used for testing heatstability performance properties to be referenced in resilient flooringspecifications.4.Apparatus4.1 Circulating Air Oven,which can be maintained at 158F6 2F(70C 6 1C).4.2 Suitable Spectrophotometer or Colorimeter with a mini-mum14in.(6.35 mm)diameter opening having both a coolwhite fluorescent(CWF)and daylight light(D-65)sources thatmeasure color in CIE L*,a*,b*using CIE 10 StandardObserver and Specular Included.See Test Method D2244.When an individual color cannot be totally covered within the14in.spectrophotometer opening,then the largest spectropho-tometer opening shall be used.4.3 A suitable holder rack that separates samples a mini-mum12in.(12.70 mm)in a standing or vertical position.5.Hazards5.1 Cautions:1This test method is under the jurisdiction ofASTM Committee F06 on ResilientFloor Coverings and is the direct responsibility of Subcommittee F06.30 on TestMethods-Performance.Current edition approved May 1,2013.Published May 2013.Originallyapproved in 1995.Last previous edition approved in 2008 as F1514 03(2008).DOI:10.1520/F1514-03R13.2For 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 5.1.1 Do not stack specimens while being exposed toelevated temperatures.5.1.2 Be sure each specimen is marked in the corner and onthe back for easy identification.5.1.3 Monitor temperature during duration of test in oven toensure maintenance of proper temperature.5.1.4 Be sure color measuring equipment is properlywarmed-up and calibrated prior to use.5.1.5 Be sure specimens are held flat when measuring color.6.Procedure6.1 Cut three specimens from each sample,approximately 2in.by 2 in.(50 mm by 50 mm).All specimens shall be of thesame color,pattern,and texture.NOTE2White,monochromatic,flat material is preferred for testing.6.2 Obtain and record initial L*,a*,and b*readings on eachof the three specimens with