1、Designation:F 627 99(Reapproved 2003)Standard Practice forTesting Flake of Single-Strike Film Typewriter Ribbons1This standard is issued under the fixed designation F 627;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of la
2、st revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon(e)indicates an editorial change since the last revision or reapproval.INTRODUCTIONFlake is a term used to describe solid ink that is removed from a film-base typewriter ribbon duringuse,other than that req
3、uired for creation of any image.It can have the cumulative effects of cloggingthe type face and contaminating the typewriter.Three variables can affect the flaking tendency of aribbon:(1)ink formulation and coated weight,(2)adhesion of the ink to the base film,and(3)designand adjustments of the type
4、writer and cartridge.Flaking can be caused by the following mechanicalforces:(1)Impact of the type faceIf the ink coating is brittle,fidelity of the edges of letters will bediminished as a result of irregular fracture by the type striking the ribbon.(2)Abrasive forces during transport of the ribbonT
5、hese can cause coating to be removed as aresult of contact of the moving ribbon with parts of the typewriter.1.Scope1.1 This practice covers two tests comparing the amount offlake of film typewriter ribbons.1.2 A short test is recommended for partially used ribbonswhere flake is suspected.1.3 Along
6、test is recommended for use with unused ribbonsthat can be tested in their entirety.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 and health practices and de
7、termine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D 3460 Specification for White Watermarked,Unwater-marked Bond,Mimeograph,Duplicator,Xerographic,andLaser Printer Cut-Sized Office PapersF 221 Terminology Relating to Carbon Paper and InkedRib
8、bon Products and Images Made TherefromF 497 Practice for Use of the Electric and Electronic Type-writer as a Test InstrumentF 1125 Terminology of Image Quality in Impact PrintingSystems3.Terminology3.1 Definitions:For definitions of terms relating to carbonpaper and inked ribbon products refer to Te
9、rminology F 221.4.Summary of Practice4.1 Both short and long tests require normal use of theribbon on the machine for which it was designed and compari-son of the results with those from a similar control ribbon,rununder the same conditions on the same typewriter.5.Significance and Use5.1 This pract
10、ice may be used for service evaluation,development,research,and specification acceptance.5.2 The tests will produce significant results only if thecontrol is the same product as the ribbon being tested.5.3 This practice does not establish a standard or imposelimits,but provides a means of assigning
11、causes and comparingresults.6.Interferences6.1 Any differences in ribbon processing,ribbon storageconditions,ribbon winding,or copy paper may cause variationin the test results.1This practice is under the jurisdiction of ASTM Committee F05 on BusinessCopy Products and is the direct responsibility of
12、 Subcommittee F05.02 on CarbonPaper and Inked Ribbons.Current edition approved July 10,1999.Published September 1999.Originallypublished as F 627 79.Last previous edition F 627 94.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.Fo
13、r Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.6.2 An equal amount of flake-off from darker writingribbons,as compared to l
14、ighter writing ribbons,would appeardarker.This should be considered when making comparisons.6.3 The same typewriter must be used for both the testribbon and the control,due to adjustment variations betweenmachines.Identical impact settings,platen position,and ribbontensions must be used for both the
15、 control and the test ribbons.6.4 Cartridge ribbons should be examined to differentiatebetween any incidence of flaking that is inherent to the ribbon,as opposed to flaking that is induced by poor design orimperfections in the cartridge.A poorly designed or badlyfabricated cartridge can cause flakin
16、g as a result of pressure ofthe ribbon against it during transport.This is particularlyimportant with correctable ribbon where the adhesion of theink to the base film is low.7.Apparatus7.1 Typewriter,on which the product being tested is nor-mally used.7.2 Device,for automated continuous operation.8.Materials8.1 Bond paper,Grade 4,Type I(Specification D 3460),20lb weight(17 3 22 in.;50 sheets)(75 8/m2).9.Sampling9.1 Standard production ribbons shall be identified by lotnumbers and at least two fr
