ASTM_D_7804_-_12_2017.pdf

Designation:D780412(Reapproved 2017)Standard Test Method forFiber Shedding of Paint Roller Covers1This standard is issued under the fixed designation D7804;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 describes a procedure for determiningthe amount of releasable fibers transferred from a paint rollercover to a surface being painted.1.2 This test method is applicable to pile fabric paint rollercovers.1.3 Because both the application and panel evaluation aresubjective,this test method should be used only for compara-tive testing within one facility using one operator for each setof applications,as the end result assigned by different facilitiesmay not agree.1.4 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.1.5 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.Some specifichazards statements are given in Section 7 on Hazards.1.6 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.Summary of Test Method2.1 The paint roller cover that is to be evaluated is used topaint a section of sealed test paper.After the paint film hasdried,the fibers are counted.3.Significance and Use3.1 fibers that are released during painting can lead to afinish that is aesthetically unacceptable.4.Test Specimen4.1 Three identical paint roller covers,9 by 1.5 in.(228.6 by38.1 mm)diameter core.5.Apparatus5.1 Paint Roller Framedesigned for the paint roller coverbeing tested.5.2 Paint Traysuitable for the paint roller cover beingtested.6.Materials6.1 Test Paintcommercially available semi-gloss or glosspaint,identified as to type,product number,and color.Paint tobe mixed to a uniform consistency.Results may vary whenusing different paint types.6.2 Sealed Test Paperto minimize absorption of test paint,which allows formation of paint film.Sections measuring 28in.(711.2 mm)wide by 20 in.(508 mm)long and have aminimum 10-mil thickness with a basis weight of 50 lb/Mft2(250 g/m2).6.3 Tack Clothcommercially prepared cloth designed toremove dust and lint.6.4 Lighted Magnifying Glasswith 5 magnification.7.Procedure7.1 All tests are to be conducted in controlled environment.7.2 Prepare a clean,dry paint tray by wiping clean with atack cloth to remove all foreign material.Wipe paper surfaceand surrounding area with tack cloth also.7.3 Secure the two sections of sealed test paper to a flatvertical surface creating a 28 by 40 in.(711.2 by 1.016 mm)test surface.7.4 Pour fresh paint into tray.Depth of paint to be the sameas the pile height of the paint roller covers being tested.Forexample,12in.(12.7 mm)pile height cover would use12in.(12.7 mm)of paint in tray.Do not use paint that has beenexposed to fibers.7.5 Place the paint roller cover on the frame.7.6 Load the paint roller cover by using twenty back andforth strokes,ten strokes total that go into the paint tray well to1This test method is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.61 on Paint Application Tools.Current edition approved June 1,2017.Published June 2017.Originallyapproved in 2012.Last previous edition approved in 2012 as D7804 12.DOI:10.1520/D7804-12R17.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.1 load the paint.Finish with four back and forth strokes,two totalstrokes that even out the paint on the ramp of the tray,notgoing into the paint well.The paint roller cover may requirehand rotation to achiever a uniform loading.7.7 Roll out the paint roller cover on the sealed test paperusing the pattern shown in Fig.1.Care should be taken tomaintain consistent light pressure on the paint roller coverduring the first eleven strokes.Finish with four lighter strokes,overlapping slightly.7.8 Cover as muc