1、 OCTOBER 2011 Page 1 of 4 This document is restricted and may not be sent outside Navistar Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2011 by Navistar, Inc. NAVISTAR INC. CEMS (CORPORATE ENGINEERING MATERIAL SPECIF
2、ICATION) NUMBER: CEMS GT-32 TITLE: Color Match Evaluation and Acceptance Criteria CURRENT ISSUE DATE: OCTOBER 2011 WRITTEN/REVIEWED BY: Materials Engineering APPROVED BY: Materials Engineering SUPERSEDES ISSUE OF: N/A PRINTED COPIES OF THIS DOCUMENT MUST BE VERIFIED FOR CURRENT REVISION This specifi
3、cation may involve hazardous materials, equipment, and procedures. This specification does not purport to address all of the safety issues associated with its use. The user is responsible to consult appropriate safety and health practices and to determine the applicability of regulatory limits prior
4、 to use. Change Notice: New specification for the evaluation and acceptance criteria of color matches. 1.0 APPLICATION This specification outlines the conditions required for the evaluation of color match submissions and the acceptance criteria. 2.0 SCOPE Color matches submitted for approval are to
5、be evaluated and documented as stated herein. Suppliers are to adhere to these guidelines in order to avoid mismatch and noticeable lot-to-lot variation. 2.1 Restricted Chemical Substances Effective January 1, 2007, all product supplied to the requirements of this specification must comply with the
6、requirements of the CEMS B-50 specification. 3.0 CONTENTS Page REFERENCE DOCUMENTS 1 DEFINITIONS 2 REQUIREMENTS 3 TECHNICAL INFORMATION 4 4.0 REFERENCE DOCUMENTS Quality System Standard ISO 9001 or TS-16949 ASTM D 523 ASTM E 308 CFR Title 29, Part 1910 ASTM D 1729 ASTM E 1164 NAVISTAR Mfg Std MS-D-1
7、3 ASTM D 2244 ASTM E 1478 NAVISTAR CEMS B-50 ASTM D 4086 ASTM E 1499 NAVISTAR CEMS G-5, Part I B ASTM D 4449 NAVISTAR Engineering Design Std A-16 NUMBER: CEMS GT-32 TITLE: Color Match Evaluation and Acceptance Criteria CURRENT ISSUE DATE: OCTOBER 2011 OCTOBER 2011 Page 2 of 4 This document is restri
8、cted and may not be sent outside Navistar Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2011 by Navistar, Inc. 5.0 DEFINITIONS Target The color to be matched. It may be defined by a sample or by the color position. Wh
9、ile the target identity can vary greatly, the most common targets are competitors colors and the Navistar Master Standard. Master Standard The approved color formulation within the Navistar color system. It is approved by Visual Appraisal against the Target. Re-Mastered Standard The approved color r
10、e-formulation within the Navistar color system. It supersedes the Master Standard and is approved by Visual Appraisal against the Master Standard. A color re-formulation occurs whenever pigments are no longer available. Working Standard Quality Control Standards approved based on visual and spectrop
11、hotometric data against the current Master Standard. Sample Panel Color Sample which does not receive formal approval. While Sample Panels are to meet the requirements based on spectrophotometric data, they are intended to be a general representation of the color and may visually vary slightly from
12、the Master Standard. 6.0 REQUIREMENTS 6.1 Submission Color formulations submitted for approval are to be applied to an adequate flat substrate at least 3” wide x 5” long. Molded in color submissions shall also include a textured and a non-textured side. If possible, such texture shall meet or be suf
13、ficiently similar to the production intent texture and gloss finish. In the event that spectrophotometric measurement of curved surfaces is necessary, the curvature of the area to be measured shall be in accordance with the limitations of the instrument to be used as recommended by the manufacturer
14、of such instrument.6.2 Visual Appraisal Visual appraisal is used to evaluate initial color submissions and initial color re-formulations. Once the formulation is approved, the quality control of such formulations is to be evaluated by Spectrophotometry. 6.2.1 Color Vision Acuteness Test Individuals
15、in charge of performing Visual Appraisals shall pass the Color Vision Tests as well as the Visual Acuity and Discrimination Tests as outlined in ASTM E 1499. Observers shall be re-certified every 5 yrs for Visual Acuity and Discrimination. 6.2.2 Light Booth Specifications Submissions shall be evalua
16、ted in a calibrated viewing booth or room that meets the requirements of ASTM D 1729. 6.2.3 Methods NUMBER: CEMS GT-32 TITLE: Color Match Evaluation and Acceptance Criteria CURRENT ISSUE DATE: OCTOBER 2011 OCTOBER 2011 Page 3 of 4 This document is restricted and may not be sent outside Navistar Inc.
17、 or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2011 by Navistar, Inc. 6.2.3.1 Color: Submissions shall be evaluated for color against the Target in accordance with ASTM D 1729 or ASTM E 1478 under simulated daylight condit
18、ions. Glossy samples are to be evaluated at a 45 degree angle from the normal in order to avoid surface reflectance. Submissions containing special effect pigments are to be evaluated for flop and sparkle. 6.2.3.2 Illuminant Metamerism: Submissions shall be evaluated for illuminant metamerism agains
19、t the Target in accordance with ASTM D 4086. The light sources shall be daylight, incandescent light, and fluorescent light. 6.2.3.3 Gloss: Submissions shall be evaluated for gloss against the Target in accordance with ASTM D 4449. 6.2.4 Required Submissions shall be equivalent to the Target in perc
20、eived color, gloss, and overall appearance, and shall not be metameric. 6.3 Color Appraisal by Spectrophotometer Spectrophotometric data is to be used as a communication tool during the initial color development process. Once the color formulation is approved by Visual Appraisal, the reflectance val
21、ues and the color space data of the approved formulation are to be used for quality control. Spectrophotometric data may be used as the sole evaluation tool to record the color change of a specimen over time as part of a weathering study or a standard re-certification program. 6.3.1 Equipment Specif
22、ications The equipment used shall be capable of measuring the reflectance of a sample between 380 nm and 780 nm. The equipment geometry shall be adequate for the sample being measured and shall comply with the guidelines stated herein. 6.3.1.1 Geometry 0/45 Adequate for measuring solid color on smoo
23、th surfaces. Multi-angle Adequate for measuring solid and gionoaparent colors on smooth surfaces. Spherical Adequate for measuring solid color on smooth and textured surfaces. 6.3.1.2 Software Settings When using an instrument equipped with CIE color space software, the software shall be set such th
24、at the elliptical tolerance presents a 2:1 ratio. 6.3.2 Methods: 6.3.2.1 Color: Specimens are to be measured in accordance with ASTM E 1164 using D65/10 illumination. Condition the specimen(s) for at least 24hrs at the same temperature and humidity as the room where the spectrophotometer resides. Re
25、cord the temperature and humidity of the room at the time of the measurements. Measure each sample in three separate locations. Note: Translucent specimens and specimens applied to card stock or to a translucent carrier, such as inks, shall be backed with a matte black substrate such as a panel pain
26、ted with NAV0004N. Transparent specimens shall be backed with a standard white tile. When directionality is present, position the instrument parallel to the direction. NUMBER: CEMS GT-32 TITLE: Color Match Evaluation and Acceptance Criteria CURRENT ISSUE DATE: OCTOBER 2011 OCTOBER 2011 Page 4 of 4 T
27、his document is restricted and may not be sent outside Navistar Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2011 by Navistar, Inc. Textiles are to be folded in layers. The number of layers will depend on the translu
28、cency of the sample. The number of layers shall be such that the measurements no longer change with additional folds. 6.3.2.2 Metamerism: Specimens are to be measured as required above under multiple illuminations. The illumination settings shall be D65/10, A/10, and F11/10. 6.3.2.3 Gloss: Measure t
29、he specular gloss at 20, 60, and 85 degrees using a gloss meter in accordance with ASTM D 523. 6.3.3 Calculations Change in color calculations shall take into consideration the color Target or the Master Standard as appropriate. Calculations may be done by hand following ASTM E 308 and ASTM D 2244.
30、However, most instrument software packages are capable of calculating these figures automatically. Set the software to calculate the CIE Lab coordinates, L, a, b, and E94 (or Ecmc as appropriate) for each illumination and at all angles the equipment is capable of reading. For gionoaparent color, cal
31、culate the flop index under D65/10 illumination only. 6.3.4 Required 6.3.4.1 Solid colors: E94 0.50 6.3.4.2 Gionoaparent color: E94 1.00, Flop index - report 6.3.4.3 Molded in color plastics: E94 0.50 6.3.4.4 Textiles: Ecmc 0.50 6.3.5 Report Instrument(s) geometry, model, and manufacturer Temperatur
32、e The CIE Lab calculations for each illumination at all the angles the equipment is capable of measuring for all three locations, and the average of the three. The reflectance readings at all wavelengths for each angle the equipment is capable of measuring for all three locations, and the average of
33、 the three. Include a photograph or other pictorial representation showing the location of the measurements on each sample and the direction of the measurement. For textiles record the number of folds. 7.0 TECHNICAL INFORMATION For further information related to the technical content of this specifi
34、cation, contact: Suppliers may purchase controlled copies of this specification by contacting: Materials Engineering and Technology Dept. Truck Development and Technology Center 2911 Meyer Road Fort Wayne, IN 46803 E-mail: MaterialsEngineeringN IHS Global Inc. 15 Inverness Way East Englewood CO 80112-5776 Phone: 1-800-854-7179 E-mail: AutomotiveIHS.com Website: http:/
