1、Designation:F 935 00Standard Test Method forComparing Cover-Up Correction Media1This standard is issued under the fixed designation F 935;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 parenthes
2、es indicates the year of last reapproval.Asuperscript epsilon(e)indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers information and procedures forevaluating several performance qualities of typewritercover-up correction tapes and tabs on a comparati
3、ve basis forgeneral office use.1.2 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
4、prior to use.2.Referenced Documents2.1 ASTM Standards:D 685 Practice for Conditioning Paper and Paper Productsfor Testing2D 3460 Specification for White Watermarked and Unwater-marked Bond,Mimeograph,Duplicator,and XerographicCut-Sized Office Papers2F 221 Terminology Relating to Carbon Paper and Ink
5、edRibbon Products and Images Made Therefrom2F 497 Practice for Use of the Electric and Electronic Type-writer as a Test Instrument22.2ANSI Standard:PH2.17 Density MeasurementsGeometric Conditons forReflection Density3PH2.18 Density MeasurementsSpectral Conditions33.Terminology3.1 For definitions of
6、terms used in this test method,refer toTerminology F 221.4.Summary of Test Method4.1 This test method consists of testing typewriter cover-upcorrection tapes and tabs under actual and simulated useconditions,using several techniques generally accepted in theinked ribbon industry.All tests should be
7、performed under thesame conditions so that comparative results may be obtained.5.Significance and Use5.1 This test method may be used to evaluate severalperformance characteristics of typewriter cover-up correctionmedia on a comparative basis.5.2 This test method is suitable for manufacturing contro
8、lon a limited basis,due to the length of time required for sometests.6.Apparatus and Materials6.1 Electric or Electronic Typewriter Calibrate and adjustin accordance with the manufacturers suggestions and PracticeF 497.6.2 ReflectometerMeeting the geometric conditions ofPH2.17 and the spectral condi
9、tions of PH2.18.6.3 Environmental ChamberCapable of maintaining 1206 2F(49 61C)at 40%6 5%relative humidity for 48 h.6.4 Magnifier33 to 53.6.5 PaperGrade 4,Type I(20 lb 17 3 22-500;SIequivalent 75 g/m2)in accordance with Specification D 3460.The felt side of the paper shall be used for the test.All t
10、estsshall be made along the machine direction of the paper.6.6 Control RibbonA single strike film,multistrike film,or fabric ribbon of known quality and performance.6.7 Cover-up Tape or TabSince this test procedure iscomparative,two or more specimens of tape or tab should beselected for evaluation.7
11、.Test Specimens7.1 The test specimens shall be a cover-up tape or tab orportion thereof not previously used or marred by handling.8.Calibration8.1 Calibrate the electric typewriter or printer in accordancewith manufacturers instructions and Practice F 497.8.2 Calibrate and standardize the reflectome
12、ter in accor-dance with PH2.17 and PH2.18.9.Conditioning9.1 Testing should be conducted in an environment withstable conditions of temperature and humidity.Papers,controlribbon,and test samples should be conditioned for 24 h in thearea in which the test will be conducted.If possible,standardconditio
13、ns meeting Method D 685 should be used.These are73 6 1.8F(23 6 1C)and 50 6 2%relative humidity.1This test method is under the jurisdiction ofASTM Committee F-5 on BusinessImaging Products and is the direct responsibility of Subcommittee F05.02 on InkedRibbons and Carbon Paper.Current edition approve
14、d Feb.10,2000.Published May 2000.Originallypublished as F 93591.Last previous edition F 93591(1995).2Annual Book of ASTM Standards,Vol 15.09.3Available from American National Standards Institute,11 W.42nd St.,13thFloor,New York,NY 10036.1Copyright ASTM,100 Barr Harbor Drive,West Conshohocken,PA 1942
15、8-2959,United States.10.Procedure10.1 Creating Test Patterns:NOTE1Great care should be taken to produce accurate test patterns.The results of calculations and observations depend upon carefully madetest patterns that avoid slippage of paper,mistypings,and misalignmentsof character strikes.If possibl
16、e,the test typewriter should be programmedto produce the test pattern thus reducing human error.10.1.1 Standard Test PatternEach test pattern consists ofa box 15 characters long and 15 lines deep.The advancementbetween lines should be12line(112in.).The preferredcharacter for producing the standard test pattern is an OCR-B10 pitch type font using an asterisk“*”character.Othercommonly used characters which may be selected are“M”,“#”,or“W”.10.1.2 Producing Six Test PatternsThe following para-graphs
