ASTM D523-89 PDF
ASTM D Standard Test Method for Specular Gloss. ASTM D Standard test method for specular gloss ASTM International offers global access to standards development for over participating countries. 21 มี.ค. แจก ASTM D, Standard Test Method for Specular Gloss. Link down load: ire 6he8e9czn. The customer isn’t.
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IS0 Wstm of alumnium and its alloys – evaluation of uniformity of appearance of architectural v523-89 finishes – determination of diffuse reflectance and specular gloss. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
The f523-89 of angles and apertures is chosen so that these procedures may be used as follows: In obtaining the visual gloss ratings, however, it is customary to compare the specular reectances of two specimens having similar surface refractive indices. If the range is greater than two gloss units, take additional readings and calculate the mean after discarding divergent results as in the section on Test for Outliers of Practice D Very similar to ISO As the voice of the U.
The following are technically similar to ISO Please first verify your email before subscribing to alerts. This standard has been approved for use f523-89 agencies of the Department of Defense. For example, glass of index 1. NOTE 1—The parallel-beam glossmeters possess the better uniformity of principle-ray angle of reection, but the converging-beam glossmeters possess the better uniformity in extent of angular divergence accepted for measurement. AS MTD Preparation and Selection of Test Specimens 8.
Gloss Meter Introduction | Industry Standards ASTM
The values given in parentheses are for information only. Measurements by this test d523-8 correlate with d23-89 observations of surface shininess made at roughly the corresponding angles. If the disparity is still more than one unit, do not use the instrument without readjustment, preferably by the manufacturer. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Do not wipe standards. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Standards Subsctiption may be the perfect solution. The dimensions and tolerance of the source and receptor shall be as indicated in F523-89 1.
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แจก ASTM D523-89, Standard Test Method for Specular Gloss.
The original values can be restored by optical polishing with cerium oxide. To calibrate, adjust the instrument to read correctly the gloss d253-89 a highly polished standard, properly positioned and oriented, and then read the gloss of a working standard in the mid-gloss range.
To measure the correction, illuminate the specimen perpendicularly and view at the incident angle with the receiver aperture specied in 6.
Keep them clean and away from any dirt that might scratch or mar their surfaces. Last previous d5223-89 D — 85e1. If the instrument asmt for the second standard still does not agree within one unit of its assigned value, repeat with another mid-range standard. Current edition approved March 31, The values given in parentheses are for information only.
How do I choose a Gloss Meter? Place the rinsed standards in a warm oven to dry. Specifies the primary standard as black glass of refractive index 1.
For specimens with brush marks or similar texture effects, place them in such a way that the directions of the marks are parallel to the plane of the axes of the incident and reected beams. If the document is revised or amended, you will be notified by email. The American Society for Testing asgm Materials takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.
A wedge of high-purity quartz provides a more stable reference standard than glass.