1、Designation: F 974 06Standard Practice forDetermination of Color Response of Electrostatic CopyingSystem, Black and White Output1This standard is issued under the fixed designation F 974; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revis
2、ion, the year of last revision. A number 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 covers the determination of the colorresponse of an electrostatic copy system, black a
3、nd whiteoutput.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 consult andestablish appropriate safety and health practices and deter-mine the applicability of regulatory limitations pr
4、ior to use.2. Referenced Documents2.1 ASTM Standards:2E97 Test Method for Directional Reflectance Factor, 45-deg 0-deg, of Opaque Specimens by Broad-Band FilterReflectometry3F 335 Terminology Relating to Electrostatic ImagingF 360 Practice for Image Evaluation of Electrostatic Busi-ness Copies3. Sig
5、nificance and Use3.1 This practice is for determining the color response of anelectrostatic copy system by examining the black and whitecopies obtained from an electrostatic copier. This practicecovers the capability of a copy system to reproduce varioussolid colors in varying shades of grey or blac
6、k and white.4. Interferences4.1 This practice can be used to measure the color responsefor different copy system conditions (machine adjustments,machine configuration, supplies, environment, and so forth).These conditions should be noted so that comparison tests canbe made.4.2 In liquid developed co
7、piers, the system color response isstrongly dependent on the condition (that is, age, concentra-tion, and so forth) of the toner bath. As a liquid toner is cycledthrough depletion and replenishment, color response may showwide fluctuations even though fluctuations in other copyquality criteria (for
8、example, background, edge effect, resolu-tion, and density) may not be altered. (See Terminology F 335.)4.3 In dry toned copiers, the system color response isstrongly dependent on the age and condition of the photocon-ductor and developer and may also show wide fluctuations incolor response even tho
9、ugh some of the copy quality criterialisted in 4.2 may not be altered.4.4 Copy systems that circulate the original to be copiedthrough the copier may not be capable of handling a consumerprepared test target.5. Apparatus5.1 Reflectometer, operated and standardized according tothe manufacturers instr
10、uctions and in accordance with TestMethod E97. Spectral response shall be for measuring thedaylight luminous reflectance factor, as described under theTerminology section of Test Method E97.6. Materials6.1 Copy paper, toning supplies, photoreceptor, and so forthshould be approved materials currently
11、 used by the evaluator.Any change of supplies from one manufacturer to those ofanother may alter the test results.7. Procedure7.1 Prepare a test target in accordance with the Test Originalsection described in Practice F 360. Select Munsell ColorChips appropriate to their copying needs and adhere by
12、anysuitable method those selected chips on a suitable papersubstrate (starting in the center of the substrate) allowingspatial intervals between the chips of at least 3.8 cm (112 in.).7.1.1 Alternate commercially available color composite tar-gets can be selected and used as a target.7.1.2 If the cu
13、stomers color is not on the target, the resultsmay be misleading results, particularly if saturated inks areused.1This practice is under the jurisdiction of ASTM Committee F05 on BusinessImaging Products and is the direct responsibility of Subcommittee F05.04 onElectrostatic Imaging Products.Current
14、 edition approved June 1, 2006. Published June 2006. Originallyapproved in 1986. Last previous edition approved in 2001 as F 974 96 (2001).2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume
15、 information, refer to the standards Document Summary page onthe ASTM website.3Withdrawn.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.7.2 Use test target in accordance with the Procedure sectiondescribed in Practice F 360.7.3 Adju
16、st the exposure dial or controls of the copyingmachine to optimize color reproduction for the selected target.This can affect other imaging functions.7.4 When comparative tests are being made by the user(equipment, supplies, test conditions, etc.), use the same target,paper, etc. in each case.7.5 Th
17、e user can also include a run-up and run-down of theexposure setting as a test for grey scale response.8. Results and Calculations8.1 Method AObserve the imaged copies under normalillumination. Identify the colors that have been clearly repro-duced (and separated if appropriate). Record all pertinen
18、tinformation regarding the test structure, that is, copier systemmodel number, supplies lot number (if one is present), supplierby name of each supply item, environmental conditions, etc.Record all data on the imaged copy.8.2 Alternate Method B:8.2.1 Using the reflectometer (in accordance with the m
19、anu-facturers instructions), determine the reflectance for eachimaged color patch, taking a minimum of three separatereadings near the center of the color patch. Record thereflectance readings adjacent to each reproduced color patch onthe imaged copy.8.2.2 Calculate the average image reflectance val
20、ue, Rn, foreach color patch as follows:Rn5TN(1)where:T = the total sum of the reflectance units recorded, andN = the total number of readings.8.2.3 For every color under consideration, there is an Indexof Color Reproduction (IC) defined by the following equation(optional calculation):IC 5 100 2100 R
21、n2 Bn!Bb2 Bn(2)where:Bn= reflectance of the copied image of a solid black patch.Bb= reflectance of the copied image of a solid white patch.Rn= reflectance of the copied image of the solid colorpatch under test (this is the same as expressed in8.2.2).9. Keywords9.1 color copiers; copiers; electrostat
22、ic imagingASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such r
23、ights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for addition
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25、TM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).F974062
