ASTM_D_2064_-_91_2012.pdf

Designation:D206491(Reapproved 2012)Standard Test Method forPrint Resistance of Architectural Paints1This standard is issued under the fixed designation D2064;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 an accelerated procedure forevaluating the print resistance of architectural paints.It differsfrom print resistance Test Method D2091 in that the latter isconcerned with lacquer finishes under packaging,shipping,andwarehousing conditions,whereas this test method is concernedwith decorative coatings undergoing random on-site pressurecontact.NOTE1Printing should not be confused with blocking,which ismeasured in Test Method D4946.The former relates to the indentation ofa surface,and the latter,the sticking together of two surfaces.1.2 The values stated in inch-pound units are to be regardedas the standard.The values given in parentheses are forinformation only.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:2D2091 Test Method for Print Resistance of LacquersD4946 Test Method for Blocking Resistance ofArchitecturalPaints3.Terminology3.1 Definitions:3.1.1 print resistance,nthe ability of a paint film to resistforming a permanent impression in a semihardened film as aresult of a pressure from an object placed on it.3.2 For additional definitions of terms,refer to Paint/Coatings Dictionary.34.Summary of Test Method4.1 A piece of cheesecloth is placed on the painted surfaceand topped with a No.8 rubber stopper(position smallerdiameter of stopper on the cheesecloth)and a 500-g weight tocreate a pressure of about 0.9 psi(6.2 kPa).This assembly isplaced in a 140F(60C),or other agreed upon temperature,oven for 1 h.When cooled,the resulting paint surfaces arerated on the numerical scale of 0 to 10,which corresponds toa subjective rating of an impression resulting from their beingin contact with the cheesecloth.5.Significance and Use5.1 The ability of a coating to resist printing is importantbecause its appearance is adversely affected if the smoothnessof the coating film is altered by contact with another surface,particularly one with a texture.Interior paint systems,particu-larly gloss and semigloss on window sills and other horizontalsurfaces,often have objects such as flower pots placed on themthat may tend to leave a permanent impression.This tendencyfor a paint film to“print”is a function of the hardness of thecoating,the pressure,temperature,humidity,and the durationof time that the object is in contact with the painted surface.6.Apparatus6.1 Conditioning Room,at 65 to 85F(18 to 29.5C)and 40to 60%relative humidity.6.2 Glass Slides,approximately 3 by 6 in.(75 by 150 mm).6.3 Drawdown Applicator,3-in.(75-mm)wide with a clear-ance of 6 mils(150 m).6.4 Oven,maintained at 140 6 3.5F(60 6 2C)or,otheragreed upon temperature.6.5 Rubber Stoppers,No.8(40-mm top diameter and32-mm bottom diameter).6.6 Cheesecloth,medium weave,24/20,bleached cotton.6.7 Scissors.1This test method is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.42 on Architectural Coatings.Current edition approved July 1,2012.Published August 2012.Originallyapproved in 1991.Last previous edition approved in 2008 as D2064 91(2008).DOI:10.1520/D2064-91R12.2For 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.3Paint/Coatings Dictionary,available from the Federation of Societies forCoatings Technology,Blue Bell,PA,1978.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 6.8 Weight,500-g.7.Procedure7.1 Cast the paints being tested on glass slides using adrawdown applicator with a clearance of 6 mils(150 m).Allow the coated glass slides to dry in the conditioned room for7 days.7.2 Cut out approximately 112by 112-in.(40 by 40-mm)pieces of cheesecloth,one piece for each slide.Use cheesecloththat is usually supplied with 4 intact layers.Do not separate thelayers.7.3 Place the test slides on a horizontal tray,painted faceupward,then place one piece of cheesecloth over each slideand top with the small diameter face of a No.8 stopper and a500-g weight,one weight and stopper for each specimen.(Weights and stoppers should be equilibrated in the oven priorto running the test.)It is recommend