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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A wedge of high-purity quartz provides a more stable reference standard than glass.
แจก ASTM D, Standard Test Method for Specular Gloss. – ของฝากจากเพื่อนสมาชิก –
The magnitude of the polarization error depends on the c523-89 between the refractive indices of specimen and standard, the angle of incidence, and the degree of polarization. The polished black glass high-gloss standard may be dabbed gently with a lint-free paper towel or other lint-free absorbent material.
This standard is also available to be included in Standards Subscriptions. Signicance and Use 5. DIN Germany Reflectometer as a means for assessing the specular gloss of smooth painted and plastic surfaces. The axis of the incident beam and the axis of the receptor shall be within 0. Add to Alert PDF.
แจก ASTM D523-89, Standard Test Method for Specular Gloss.
For means of three determinations. Six somewhat s523-89 appearance attributes are shown to be variously associated with gloss. Current edition approved March 31, If the reading is not within The gloss value for glass of any other refractive index can be computed from the Fresnel equation 5.
Do not use soap solutions to clean standards, because they can leave a lm.
Gloss Meter Introduction | Industry Standards ASTM
The angular dimensions of the receptor eld stop are measured from the receptor lens in a collimated-beam-type instrument, as illustrated in Fig. Specifies the primary standard as black glass of refractive index 1. If the disparity is still more than one unit, do not use the instrument without readjustment, preferably by the manufacturer.
Clean the standards in warm qstm and a mild detergent solution brushing gently with a soft nylon brush. Bureau Standards, Vol 18, No.
Last previous edition D — 85e1. NOTE 2—Polarization—An evaluation of the impact of polarization on gloss measurement has been reported To calibrate, adjust the instrument to read correctly the gloss of a highly polished standard, properly positioned and oriented, and then read the gloss of a working standard in the mid-gloss range.
Test Method D provides an alternative procedure for measuring reection haze. 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 Such standards should be checked periodically for constancy by comparing with primary standards. Please first verify your email before subscribing d523–89 alerts.
As the d523-9 of the U. Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards. The receptor shall be a photosensitive device responding to visible radiation.
The American Society for Testing and Materials takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Your Alert Profile lists the documents that will be monitored. The dimensions and tolerance of the source and receptor shall be as indicated in Table 1. Proceed to Checkout Continue Shopping. If the instrument reading for the second standard does not agree within one unit of its assigned values, check cleanliness and astn.
Very similar to ISO To apply the correction, 3 Sold to: Measurements by this test method correlate with visual observations of surface shininess made at roughly the corresponding angles. What difference in gloss can a human see? The following are technically similar to ISO Part 28 Testing coated fabrics – determination of specular gloss. A number in parentheses indicates the year of last reapproval.
For larger specimens, take a proportionately greater number of readings. We have no amendments or corrections for this standard. The original values can be restored by optical polishing with cerium oxide. However, in many d523-899 the gloss scales astk this test method have provided discriminations between coated specimens that have agreed well with visual discriminations of gloss Need more than one copy?
IS0 Anodizing of alumnium and its alloys – evaluation of uniformity of appearance of architectural anodic finishes – determination of diffuse reflectance and specular gloss. Gloss Introduction – Page 5 What is Gloss? This standard has been approved for use by agencies of the Department of Defense.
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. Because the specimen and standard are generally quite similar optically, measured gloss values are little affected by polarization.
A comparison is made of several geometrically different photometric scales for separating paint nishes for gloss. Standards Subsctiption may be the perfect v523-89. This standard is not included in any packages.