1、Designation:F1946/F1946M10Standard Practice forAccelerated Testing of the Lightfastness of Ink Jet PrintsExposed to Indoor Fluorescent Lighting andWindowFiltered Daylight1This standard is issued under the fixed designation F1946/F1946M;the number immediately following the designation indicates the y
2、earof original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice covers an accelerated procedure intendedto sc
3、reen ink jet prints for lightfastness in office environmentswhere overhead fluorescent light and window-filtered daylightis used for illumination.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system may not be exact equ
4、ivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.1.3This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this
5、 standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.Specific precau-tionary statements are given in Section 8.2.Referenced Documents2.1 ASTM Standards:2D1729 Practice for Visual Appraisal of Colors and ColorDifferenc
6、es of Diffusely-Illuminated Opaque MaterialsD2244 Practice for Calculation of Color Tolerances andColor Differences from Instrumentally Measured ColorCoordinatesD3424 Practice for Evaluating the Relative Lightfastnessand Weatherability of Printed MatterD4674 Practice forAccelerated Testing for Color
7、 Stability ofPlastics Exposed to Indoor Office EnvironmentsG113 Terminology Relating to Natural and Artificial Weath-ering Tests of Nonmetallic Materials2.2 ANSI Standard:ANSI/NAPM IT9.9-1996 Stability of Color PhotographicImagesMethods of Measuring33.Terminology3.1 Definitions:3.1.1 ink jet mediare
8、cording elements used by ink jetprinters to receive inks.The substrate may be paper,plastic,canvas,fabric,or other ink receptive material.The substratemay,or may not be,coated with one or more ink receptivelayers.3.2 The definitions given in Terminology G113 are appli-cable to this practice.4.Summar
9、y of Practice4.1 Printed ink jet media are exposed to radiant energy froman array of 11 very high output(VHO)cool,white fluorescentlamps and,simultaneously,to intermittent energy from twosoda-lime glass-filtered fluorescent UV lamps.The extent ofUV radiant exposure(nominal UV actinic exposure or UVA
10、E)from both sources is determined separately as the product ofUV irradiance at the start of the test and exposure time,inWatt-hours/m2(W-h/m2).NOTE1The relative spectral power distribution for cool whitefluorescent lamps may be found in ANSI/NAPM IT9.9-1996,Table 5.4.1.1 The contribution of the sunl
11、amp actinic exposure tothe total UV actinic exposure is maintained constant byadjusting the on/off cycle time of the sun lamps.4.1.2 The average nominal sunlamp UV actinic exposure isset at 12%of the value of for the VHO lamps.NOTE2Most UV exposure results from fluorescent lighting,althoughsome is d
12、ue to sunlight.The 12%is an estimate of a representative officeenvironment.4.2 The duration of the exposure may vary widely depend-ing on the lightfastness of the ink/media.4.3 During the course of the exposure,the color changes inthe printed samples are periodically evaluated either visually or1Thi
13、s practice is under the jurisdiction of ASTM Committee F05 on BusinessImaging Products and is the direct responsibility of Subcommittee F05.07 on Ink JetImaging Products.Current edition approved Oct.1,2010.Published October 2010.Originallyapproved in 1998.Last previous edition approved in 2004 as F1
14、946 04.DOI:10.1520/F1946_F1946M-10.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3American National Standards In
15、stitute,25 W.43rd St.,4th Floor,New York,NY 10036.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 instrumentally.Results are compared to an exposed control,anunexposed file specimen,or the same specimen prior toexposure.The color change s
16、hall be measured as percentretained density and color difference,DE*.4.4 The exposure may be continued for a specific durationof time,or until a predetermined color change has beenachieved.5.Significance and Use5.1 Lightfastness of printed ink jet media for specifiedperiods of time is pertinent to the end use of these materials.Since the ability of an ink jet print to withstand color changesis a function of the spectral power distribution of the lightsource to which it is exposed,it is important
