SAE J 1767-1995 Instrumental Color Difference Measurements for Colorfastness of Automotive Interior Trim Materials Recommended Practice《汽车内饰材料色牢度仪器色差测量的推荐实施规程 1995年1月》.pdf

1、_ 6$(7HFKQLFDO6WDQGDUGV%RDUG5XOHVSURYLGHWKDW7KLVUHSRUWLVSXEOLVKHGE6$(WRDGYDQFHWKHVWDWHRIWHFKQLFDO and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising tKHUHIURPLVWKHVROHUHVSRQVL

2、ELOLWRIWKHXVHU SAE reviews each technical report at least every five years at which time it may be revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions. Copyright 2014 SAE International All rights reserved. No part of this publication may be reproduced, st

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4、0 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/J1767_201401 SURFACE VEHICLE RECOMMENDED PRACTICE J1767 JAN2014 Issued 1995-01 Reaffirmed 2014-01 Superseding J17

5、67 JAN1995 Instrumental Color Difference Measurements for Colorfastness of Automotive Interior Trim Materials RATIONALE J1767 has been reaffirmed to comply with the SAE five-year review policy. ForewordThis Document has not changed other than to put it into the new SAE Technical Standards BoardForma

6、t.1. ScopeThe practice described applies to textile and flexible plastic parts and materials used in automotivevehicles. Special care should be taken when high pile carpet samples are being evaluated.1.1 PurposeThe intent of this SAE Recommended Practice is to specify procedures for the instrumental

7、measurement of color differences brought about by the exposure of textile and flexible plastic automotive partsto various colorfastness tests. It may be used for the specification of limits of color differences which may betolerated in a specific test.2. References2.1 Applicable PublicationsThe foll

8、owing publications form a part of this specification to the extent specifiedherein.2.1.1 CIE PUBLICATIONAvailable from U.S. National Committee, CIE (Commission Internationale de lEclairage),c/o Mr. Tom Lemons, TLA, Lighting Consultants, 7 Pond Street, Salem, MA 01970, 508-745-6870, Fax 508-741-4420.

9、CIE Publication No. 15.2Colorimetry, 2nd edition, 19862.1.2 AATCC PUBLICATIONAvailable from American Association of Textile Chemists & Colorists, 1 Davis Drive,P.O. Box 12215, Research Triangle Park, NC 27709-2215, 919-549-8141, Fax 919-549-8933.AATCC Method 173-1992Calculation of Small Color Differ

10、ences for Acceptability3. Definitions3.1 ColorfastnessThe resistance of a material to change in any of its color characteristics, to transfer itscolorant(s) to adjacent materials, or both, as a result of the exposure of the material to any environment thatmight be encountered during testing.3.2 Colo

11、r DifferenceA color change in a sample or in a fabric, in which color has been altered or transferredfrom the sample as a result of testing.3.2.1 COLOR CHANGEA change in color of any kind, whether in lightness, hue, or chroma that may be measuredinstrumentally by comparing materials before and after

12、 testing.4. Basic Color Measurement Specifications4.1 Uniform Color SpaceAll measurements and calculations will be made using CIE 1976 L*a*b*Uniform ColorSpace, which may be abbreviated CIELAB (see 2.1.1).4.2 Standard IlluminantThe Standard Illuminant for colorimetric determinations will be the CIE

13、illuminant D65(see 2.1.1). No other illuminant may be used except by agreement between contractual parties.4.3 Standard ObserverThe Standard Observer for colorimetric determinations will be the CIE 10 degreesobserver. No other observer may be used except by agreement between contractual parties.5. C

14、olor Difference CalculationsThree sets of color difference calculations may be used:5.1 Delta L*,a*,b*(Eq. 1)(Eq. 2)(Eq. 3)(Eq. 4)where subscripts o and t refer to measurements in the original and final material.5.2 Delta L*,C*,H*(Eq. 5)(Eq. 6)(Eq. 7)5.3 Delta CMCThe CMC method of color difference m

15、easurement is one which is being used with increasingfrequency and the necessary calculations are given in 2.2.1 (reference only).6. Color Difference SpecificationsColor difference specifications shall be determined by the contractualparties. The specifications should be in the form described in Sec

16、tion 4.7. Color Measuring InstrumentsThe instruments used to determine color must have capabilities to meet therequirements set forth in Section 3. If a sphere instrument is used, the specular component must be includedin the measurement. The angle between the specimen normal and the illuminating be

17、am or vice-versa in thesphere instruments must not exceed 10 degrees.DLLtLo()=Daatao()=Dbbtbo()=DEDL()2Da()2 Db()2+12=DLLtLo()=DCat2bt2+()12ao2bo2+()12=DHDE()2DL()2 DC()2=SAE J1767 Reaffirmed JAN2014 Page 2 of 3_8. Color Measurement Method8.1 Color Difference SampleA single sample is used. The color

18、 properties of the sample are measured firstand the data stored, the sample is exposed to the test conditions, and the color is again measured.It is imperative that the measured location be identified exactly in order that the same spot and orientation onthe fabric surface can be measured each time.

19、8.2 Sample PreparationParticular attention shall be given to the appearance of the sample. The sample shallbe cut so that the direction or lay of the pile or fabric is easily identified and oriented in a constant directionduring the exposure and measurement of its color. It shall be freed from lint,

20、 etc., using a lint brush and if it hasa pile, it shall be brushed in the direction of the pile lay before reading and exposure.8.3 Sample MountingThe sample shall be mounted on a flat surface so that it is presented to the measuringport of the color measuring instrument in a uniform reproducible ma

21、nner. If the sample is transparent it shallbe backed with a sufficient thickness of the test fabric to eliminate a contribution of the backing material to themeasurement. The direction of the natural lay of the sample shall be identified on the back of the mountingsurface to facilitate correct sampl

22、e orientation in the measurement instrument.8.3.1 INSTRUMENT SET UPThe instrument used for the color measurement shall be standardized according to theprocedures specified by its manufacturer.8.3.2 SAMPLE EQUILIBRATIONThe sample shall be in equilibrium with the standard laboratory environment before

23、reading on the measurement instrument. The time to reach equilibrium will be different for different fabrictypes and should be agreed upon by the contractual parties. The standard laboratory environment is 21 C 2 C and 50% 5% R.H. or as agreed to by the contractual parties.8.3.3 PRESENTATION OF THE

24、SAMPLE TO THE INSTRUMENTThe instrument port shall be matched to the size of thesample being measured (it will be close to 25 mm in diameter). The sample shall be loaded in the instrumentport without glass and using a sufficient pressure to hold the sample in place without forcing the pile into theme

25、asurement chamber. Having been established, this pressure shall remain constant for the sample beingtested. Typically 500 g 10 g per 5 cm x 10 cm sample area is satisfactory. Special situations may requirethat the contractual parties agree on a different value.The sample shall be oriented in a stand

26、ard direction. Identifying markings on the sample or its mountingshall be used to ensure that the orientation and position of the sample in the port is the same before andafter testing.8.3.4 SAMPLE HANDLING AND STORAGEColor measurement, especially in high pile carpets, can be greatlyinfluenced by th

27、e physical condition of the material surface. It is therefore important to keep the surfaceconstant after the surface has been prepared. Handling of the sample surface to be measured must beavoided.8.3.5 COLOR MEASUREMENTTwo readings, initial and 90 degrees rotation, are to be averaged, unless thein

28、strument has been proven insensitive to specimen orientation, in which case a single color reading will betaken.9. ReportingThe color difference measurement should be calculated as agreed in Section 5, with reporting asagreed between contractual parties.PREPARED BY THE SAE TEXTILES AND FLEXIBLE PLASTICS COMMITTEESAE J1767 Reaffirmed JAN2014 Page 3 of 3_