1、Designation:F 396 00Standard Practice forComparing One-Time Noncorrectable Typewriter Ribbons1This standard is issued under the fixed designation F 396;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A numbe
2、r in parentheses indicates the year of last reapproval.Asuperscript epsilon(e)indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice provides information and techniques forevaluating several performance qualities of one-time noncor-rectable typewriter ribbons on
3、 a comparative basis for generaloffice use,but not for specialized applications such as opticalcharacter recognition(OCR),data terminals,etc.1.2 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of whoever uses this standard to
4、 consult andestablish appropriate safety and health practices and deter-mine the applicability of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:D 1776 Practice for Conditioning Textiles for Testing2F 221 Terminology Relating to Carbon Paper and InkedRibbon Products and
5、 Images Made Therefrom3F 550 Test Method for Lithographic Properties of ImagingMaterials3F 627 Practice for Testing Flake of One-Time Film Type-writer Ribbons32.2ANSI Standards:PH2.17 Density MeasurementsGeometric Conditions forReflection Density4PH2.18 Density MeasurementsSpectral Conditions43.Summ
6、ary of Practice3.1 This practice essentially consists of testing one-timenoncorrectable ribbons under actual-and simulated-use typeconditions,employing an automatic or robot typewriter,andseveral use-simulating techniques generally accepted in thisindustry.All tests must be run in duplicate under th
7、e sameconditions so that comparative results are obtained.4.Significance and Use4.1 This practice can be used to evaluate various propertiesof one-time noncorrectable ribbons on a comparative basis.These properties include write,flake-off,heat stability,bleed-through,offset master erasability,reprod
8、uction,unintentionaltransfer,and general quality,that is,splices,skips,and holes incoating,offset to back of ribbon,and transfer to fingers.4.2 This practice is suitable for comparative service evalu-ation and research and development.This practice may not bepractical for manufacturing control becau
9、se of time required torun some of the tests.5.Apparatus and Materials5.1 Electric Typewriter,which can be used in conjunctionwith a robot device(or can be programmed)that has beenadjusted in accordance with the instructions supplied by themanufacturer.5.2 Reflection Densitometer,meeting the geometri
10、c condi-tions of PH2.17 and the spectral conditions of PH2.18.5.3 Oven,capable of maintaining 120 6 2F(49 6 1C)at40%relative humidity for 48 h.5.4 Magnifier,43.5.5 Paper,of the type to be used when ribbon is“in use.”5.6 Reflectance Meter,equipped with a 0.008-in.(0.2-mm)aperature.5.7 Sutherland Ink
11、Rub Tester.5.8 Polyethylene Foam,1/8-in.(3-mm)thick.5.9 Buehler Polishing Cloth,No.4C-7228 or equivalent.6.Test Specimen6.1 The test specimens shall be a portion of each of theribbons not previously used or handled.7.Conditioning7.1 Condition in accordance with Practice D 1776.8.Test Methods8.1 Writ
12、e:8.1.1 Use the robot device to prepare a standardized numberof lines of typing.8.1.2 Measure the reflection density of each image inaccordance with PH2.17 and PH2.18 or make a visual com-parison.8.1.3 Examine writes under a 43 magnifier and comparethem for sharpness,uniformity,and voids.8.2 Flake-o
13、ff:8.2.1 Test in accordance with Practice F 627.8.3 Oven Test(Effects of High Temperature):8.3.1 Place a sample ribbon in an oven at 120 6 2F(49 61This practice is under the jurisdiction of ASTM Committee F-5 on BusinessCopy Products and is the direct responsibility of Subcommittee F05.02 on CarbonP
14、aper and Inked Ribbons.Current edition approved Feb.10,2000.Published May 2000.Originallypublished as F 396 74.Last previous edition F 396 79(1995).2Annual Book of ASTM Standards,Vol 07.01.3Annual Book of ASTM Standards,Vol 15.09.4Available from American National Standards Institute,11 W.42nd St.,13
15、thFloor,New York,NY 10036.1Copyright ASTM,100 Barr Harbor Drive,West Conshohocken,PA 19428-2959,United States.1C)at 40%relative humidity for 48 h.8.3.2 After stabilization at 73 6 2F(236 1C)for 6 h,examine for loose cores,loose leaders,visible distortion,adhesion between layers,material transfer,and
16、 changes inwrite and flake-off in accordance with 8.1 and 8.2.8.4 Bleed-Through(Cover-up Fluid,Tape,or Tabs):8.4.1 Treat separate standard write samples with cover-upfluid.Cover others with correction tape,and correct othersusing correction tabs.8.4.2 Compare after 5 min and again after 24 h with othersamples and untreated portions for bleeding and coverage.8.5 Offset Master Erasability Test:8.5.1 Refer to appropriate section of Test Method F 550 forproper procedure to determine erasability prop
