1、TEPAC P U B L I CAT ION Test Method for Specular Gloss APRIL 1987 ELECTRONIC INDUSTRIES ASSOCIATION ENGINEERING DEPARTMENT h EIA TEPLOS-13 7 H 3234600 0007332 5 H NOTICE EIA Engineering Standards and Publications are designed to serve the public interest through eliminating misunderstandings between
2、 manufacturers and purchasers, facilitating interchangeability and improvement of products, and assisting the purchaser in selecting and obtaining with minimum delay the proper product for his particular need. Existence of such Standards and Pub- lications shall not in any respect preclude any membe
3、r or non-member of EIA from manufacturing or selling products not conforming to such Standards and Publications, nor shall the existence of such Standards and Publications preclude their voluntary use by those other than EIA members, whether the standard is to be used either domestically or internat
4、ionally. Recommended Standards and Publications are adopted by EIA without regard to whether or not their adoption may involve patents on articles, materials, or processes. By such action, EIA does not assume any liability to any patent owner, nor does it assume any obligation whatever to parties ad
5、opting the Recom- mended Standard or Publication. Published by ELECTRONIC INDUSTRIES ASSOCIATION Engineering Department 2001 Eye Street, N.W. Washington, D.C. 20006 PRICE: $5.00 Published in U.S.A. EIA TEPLOS-L3 7 m 3234600 0007333 7 m TEP10 5 - 13 TEST METHOD FOR SPECULAR GIES This publication was
6、formulated under the cognizance of the JT-31 Committee on ptical Characteristics of Display Devices and approved by the Tube Engineering Panel Advisory Council (TEPAC). The TEP105 series of publications comprises a set of test methods developed for industrial cathode ray tubes. cathode ray tubes wit
7、h respect to parameters, which are of interest to users of these devices. They are intended to be useful in evaluating i W. % EIA TEPLOS-L3 87 3234b00 000733Li 9 TEP105-13 Page 1 TEST METHOD FOR SPECULAR GLOSS 1.0 Scope This method covers a test procedure for the measurement and eval- uation of non-
8、glare surfaces in terms of specular gloss for screened tubes and panels at 60“ & 45“ and unscreened panels & coverplates at 60, 45“ and 20“ glossmeter geometry. 2.0 Definitions 2.1 Specular Gloss: The luminous fractional reflectance of a specimen in the specular direction (TEP-66A). 2.2 Luminous Fra
9、ctional Reflectance: The ratio of the luminous flux reflected from, to that incident on, a specimen for specified solid angles. 3.0 Apparatus Requirements . 3.1 Gloss Measurements (60 ASTM D 523 and 45“ ASTM C 346, and 20“ ASTM D . 523). 3.1.1 The apparatus shall consist of an incadescent light sour
10、ce, single aperture receptor, means of locating the surface of the specimen, and a receptor located to receive the rays reflected by the specimen. The receptor shall be a photo sensitive device responding to visible radiation. The spectral transfer function of the system shall be in close conformanc
11、e with the standard observer “Y“ funcfion under illuminant C as specified by the CIE (1931). EIA TEPLOS-13 87 3234600 0007335 O = TEP1 05-1 3 Page 2 TEST METHOD FOR SPECULAR GLOSS 3.1.2 Geometric condition shall be arranged so that the angle of illumination and source receptor be at the specified an
12、gles from the perpendicular to the specimen surface. shall be at the mirror reflection angle of the axis of the incident beam so that with a flat piece of polished glass or equivalent front surface mirror in the specimen position, an image of the source shall be formed at the center of the receptor
13、aperture. Glossmeters applicable include: (Hunter Labs ) . The measurement mechanism shall give a numerical indication that is proportional to the light flux passing through the receptor field stop within il% of full scale reading. 3.1.4 Primary standards (ASTM) may be polished plain black glass wit
14、h a gloss value assigned by the manufacture in accordance with ASTM D523 and C346. Other standards shall be calibrated against a primary standard and checked periodically for constancy by comparing with a primary standard. The axis of the receptor Glossgard II (Gardner/Nectec Instr. Div. ), D48 3.1.
15、3 3.1.5 Apparatus Verification (a) Check the zero of the glossmeter. reading is less than fO.l units. Adjust the glossmeter to read the gloss value of the working black glass calibration standard. Read the gloss of une or more reference standards having poorer image-forming characteristics. Adjust z
16、ero so that zero (b) (c) - EIA TEPLOS-13 7 m 3234600 0007336 2 m TEPl05-13 Page 3 TEST METHOD FOR SPECULAR GLOSS 3.1.5 Apparatus Verification (contd.) (c) If the glossmeter readings of the reference standards do not agree with their assigned gloss values, to within 1 percent, clean the tiles and rem
17、easure. .If necessary, then adjust the glossmeter in accordance with instructions supplied by the manu- facturer, or return the glossmeter for adjustment. . 4.0 Preparation of Test Specimen 4.1 Gloss Measurement 4.1.1 Measurement Surface Preparation Clean the surface to be measured in warm water and
18、 mild detergent solutions. Rinse with hot running water removing detergent solution. Final rinse in distilled water. towel. Dry by dabbing with a lint-free paper 4.1.2 Back Surface Elimination for Panels & Coverplates The reflection from the second surface should be eliminated by use of black glass
19、and refractive index oil: The surface of the back glass is flat and polished. surface, opposite the point of impingement of the incident beam of light, to absorb all transmitted light. eliminated by placing a thin film of oils of the same refractive index This black glass is placed on the inner The
20、surface reflections are as the glass between the surfaces. with no bubbles or voids. to measure gloss are as follows: This must be a continuous film Working methods that are sometimes used Index of Refraction Oi Is may be obtained from Cargille Labs in Cedar Grove, NJ or other sources. _ _ EIA TEPLO
21、S-13 87 m 3234600 0007337 4 m TEP1 05-1 3 Page 4 TEST METHOD FOR SPECULAR GLOSS 4.7.2 5. O 5.1 5.1.1 5.1.2 5.1.3 5.1.4 Back Surface Elimination for Panels & Coverp 1. By fitting a flat black material against 2. Using a black cloth plus oil. ates (cont d. ) the second surface. 3, Using polished glass
22、 wedge for flat surfaces. Although methods 1 & 2 increase the measuring error, they are easily accomplished. or between locations where correlation is extremely well coordinated. These methods should only be used on a comparative basis Procedure Gloss Measurement Operate the glossmeter according to
23、the manufacturers instructions. Use the calibrated black glass standard for standardization of the instrument. Calibrate the instrument at the start and completion of every period of glossmeter operation, and during the operation at sufficient frequent intervals to assure that instrument response is
24、 practically constant. The-glossmeter is placed on the tube face and pane7 or coverplate and maximum specular gloss values recorded. rocked about the optical axis to obtain the maximum value. curvatures will have an effect on gloss values and should not be used i nter-cornparat i ve 1y. ) Multiple m
25、easurements are recommended. lhe glossmeter should be (Different TEP1 05-1 3 Page 5 e TEST METHOD FOR SPECULAR GLOSS 6.0 Report The test report should contain the following information: A. Specular gloss value 0. Geometry used C. D. Glossmeter manufacturer E. Glossmeter model and designation F. Sample identification G. Sample preparation H. Specify method of removing back surface reflection Operators name, date, laboratory and location. I. Radius of curvature of curved sample under test.
