1、Designation:F76798(Reapproved 2013)Standard Test Method forImage Stability of Chemical Carbonless Paper to Light1This standard is issued under the fixed designation F767;the number immediately following the designation indicates the year of originaladoption or,in the case of revision,the year of las
2、t revision.Anumber in parentheses indicates the year of last reapproval.Asuperscriptepsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers the determination of the imagestability of chemical carbonless paper by exposure to fluores-cent light f
3、or a controlled time period.Stability to light isdetermined by visual comparison between exposed and unex-posed samples.1.2 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 on
4、lyand are not considered standard.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 limitatio
5、ns prior to use.2.Referenced Documents2.1 ASTM Standards:2D585 Practice for Sampling and Accepting a Single Lot ofPaper,Paperboard,Fiberboard,and Related Product(Withdrawn 2010)3F221 Terminology Relating to Carbon Paper and InkedRibbon Products and Images Made TherefromF497 Practice for Use of the E
6、lectric and Electronic Type-writer as a Test InstrumentF549 Terminology Relating to Carbonless Copy Products3.Summary of Test Method3.1 Carbonless paper to be tested and previously testedcontrol paper are selected and prepared for imaging.The testsamples and control shall be imaged during the same t
7、imeperiod with the same imaging device and pressure settings.Images are produced either on the coated front(CF)surface ofCF paper or on the CF surface of the coated front and back(CFB)paper.A portion of the image area for each test sampleand control is exposed to fluorescent light for a controlledpe
8、riod of time.Image stability to light is determined by visualcomparison of exposed and unexposed imaged areas of thesame sample to exposed and unexposed imaged areas of acontrol paper.Comparisons are made by establishing animage-stability ranking order.4.Significance and Use4.1 This test method is a
9、 comparative test for determiningthe relative image stability of chemical carbonless papersamples.4.2 The light source used simulates that of an officeenvironment,while accelerating image fade.5.Interferences5.1 Test results will depend upon image intensity and theimaging method.The greater the pres
10、sure of the imagingdevice,the greater the amount of reactive material transferred,and the greater the intensity of the image.Fade resistance isgenerally increased when the intensity is high.Also,allcarbonless papers do not exhibit the same reactive materialtransfer efficiency with different imaging
11、devices.Therefore,the imaging device used should ideally be the same as that onwhich the paper that is used in the final application.If this isnot possible,a commercial office electric typewriter set inaccordance with Practice F497(maximum impact pressurewithout embossing)should be used.5.2 The imag
12、e produced on carbonless paper is a result ofthe interaction of the coated back(CB)and coated front(CF)surfaces.The light stability of the image is thus a function ofboth coatings.Although the images on the CF surface areexposed to light with this method,what is actually being testedis the light sta
13、bility of the CB-CF combination.Therefore a CBpaper is tested in combination with a CF paper,and vice versa;a coated front and back(CFB)paper is tested separately witha CB paper and a CF paper to evaluate both surfaces.5.3 Only the images from the same combinations of coatedpapers should be compared
14、(CB-CF;CB-CFB;CFB-CF;CFB-CFB)since one side of most chemical carbonless papersis affected by light more than the other.1This test method is under the jurisdiction ofASTM Committee F05 on BusinessImaging Products and is the direct responsibility of Subcommittee F05.06 onCarbonless and Thermal Imaging
15、 Products.Current edition approved April 1,2013.Published April 2013.Originallyapproved in 1982.Last previous edition approved in 2008 as F767 98(2008).DOI:10.1520/F0767-98R13.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For An
16、nual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.4 Any variation in light intensity or in the ambientconditions of temperature or humidity,or both,could affect theresults.Observe the manufacturers recommendations for lamplife.5.5 Testing diffe
