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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Current edition approved March 31, Such standards should be checked periodically for d5233-89 by comparing with primary standards. Place the rinsed standards in a warm oven to dry. Because the specimen and standard are generally quite similar optically, measured gloss values are little affected by polarization.
Has unusual converging beam geometry. Already Subscribed to this document.
แจก ASTM D523-89, Standard Test Method for Specular Gloss.
If the disparity is still more than one unit, do not use the instrument without readjustment, preferably by the manufacturer. Test Method E includes techniques for the measurement of both distinctness-of-image gloss and reection haze. The magnitude of the polarization error depends on the difference between the refractive indices of specimen and standard, the angle of incidence, and the degree of polarization. Signicance and Use 5.
ASTM D – 89() Standard Test Method for Specular Gloss
Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. Rhopoint IQ Flex Add to Alert PDF. Therefore, as ast, as six different photometric scales may be required to handle all gloss measurement problems.
Please first verify your email before subscribing to alerts. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Preparation and Selection of Test Specimens 8. If the instrument reading for the second standard does not agree within one unit of its assigned values, check cleanliness and repeat.
A comparison is made of several geometrically different photometric scales for separating paint nishes for gloss. IS0 Anodizing of alumnium and its alloys – evaluation of uniformity of appearance of architectural anodic finishes – determination of diffuse reflectance and specular gloss. Keep them clean and away from any dirt that might scratch or mar their surfaces.
NOTE 5—For some types of paint, particularly semi-gloss, the measured gloss is affected by method of lm preparation and drying conditions so that the reproducibility of results from such materials may be poorer than the values given in Table 3.
You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server. Since the instrumental ratings are affected more than the visual ratings by changes in surface refractive index, non-agreement between visual and instrumental gloss ratings can occur when high gloss specimen surfaces differing in refractive index are compared.
For means of three determinations. For larger specimens, take a proportionately greater number of readings. 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 Since specular reection is, in general, spectrally nonselective, spectral corrections need to be applied only to highly chromatic, low-gloss specimens upon agreement of users of this test method.
To apply the correction, 3 Sold to: 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. The original values can be restored by optical polishing with cerium oxide. DIN Testing of paper and board; reflectometer as means for gloss Assessment of paper and board.
The following are technically similar to ISO Measurements by this test method correlate with visual observations of surface shininess made at roughly the corresponding angles.
This standard is subject to revision at any time by the responsible technical committee and must be reviewed every ve years and if not revised, either reapproved or withdrawn. Compares visual difference ratings with instrumental measurements of specular gloss, distinctness of image gloss, and haze for series of black, gray, and white painted specimens. The luminous ux entering the receiver aperture from the perfect white diffusor would give the following gloss indications for each of the geometries: Last previous edition D — 85e1.
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 Subscriptions from ANSI provides a money-saving, multi-user solution dd523-89 accessing standards. Never place standards face down on a surface that may be dirty or abrasive. It is the responsibility of the user of this standard to establish appropriate safety 5d23-89 health practices and determine the applicability of regulatory limitations prior to use.
The axis of the receptor shall be at the mirror reection of the axis of the incident beam. How is Gloss Measured?
NOTE 2—Polarization—An evaluation of the impact of polarization on gloss measurement has been reported With a at piece of polished black glass or other front-surface mirror in the specimen position, an image of the source shall be formed 6.
In obtaining the visual gloss ratings, however, it is customary to compare the specular reectances of two specimens having similar surface refractive indices. The values given in parentheses are for information only.