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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ASTM D() – Standard Test Method for Specular Gloss

Cone and Plate Viscometer. A comparison is made of several geometrically different photometric scales for separating paint nishes for gloss. For small differences in refractive index, however, the gloss value is a linear function of index, but the rate of change of gloss with index is different for each geometry. 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.

Because the specimen and standard are generally quite similar optically, measured gloss values are little affected by polarization. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. We have no amendments or corrections for this standard.

Do not use soap solutions to clean standards, because they astn leave a lm. For larger specimens, take a proportionately greater number of readings.

Please first log in 5d23-89 a verified email before subscribing to alerts. 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.

Six somewhat different appearance attributes are shown to be variously associated with gloss. Already Subscribed to this document.

แจก ASTM D523-89, Standard Test Method for Specular Gloss.

If the instrument reading for the second standard still does not agree within one unit of its assigned value, repeat with another mid-range standard. Measurements by this test method correlate with visual observations of surface shininess made at roughly the corresponding angles.

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What difference in gloss can a human see? Copyright ASTM Standard Test Method for Specular Gloss1 This standard is issued under the xed designation D ; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision.

A wedge of high-purity quartz provides a more stable reference standard than glass. The tolerances are chosen so that errors sstm the source and receptor apertures do not produce an error of more than one gloss unit at any point on the scale 5. Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards.

ASTM D Gloss_百度文库

Similar to ISO NOTE 2—Polarization—An evaluation of the impact of polarization on gloss measurement has been reported The angular dimensions of the receptor eld stop are measured from the ashm lens in a collimated-beam-type instrument, as illustrated in Fig. Part 28 Testing coated fabrics – determination of specular gloss.

DIN Testing of paper and board; reflectometer as means for gloss Assessment of paper and board. Do not wipe standards. Cylindrical Mandrel Bend Tester. The luminous ux entering the receiver aperture from the perfect white diffusor would give the following gloss indications for each of the geometries: The directions associated with mirror or specular reection normally have the highest reectances.

A number in parentheses indicates the year of last reapproval. 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. Test Method E includes techniques for the measurement of both distinctness-of-image gloss and reection haze. Gloss Meter for Curved Surfaces. The axis of the receptor shall be at the mirror reection of the axis of the incident beam.

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This standard has been approved for use by agencies of the Department of Defense. Your Alert Profile lists the documents that will be monitored. Has unusual converging beam geometry. Pt 5, Method A Methods of testing plastics – optical and colour properties, weathering – determination of specular gloss. How is Gloss Measured? 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.

If the document is revised or amended, you will be notified by email.

The gloss value for glass of any other refractive index can be computed from the Fresnel equation 5. If the range is greater than two gloss units, take additional readings and calculate the mean after discarding divergent results as astn the section on Test for Outliers atsm Practice D The dimensions and tolerance of the source 5d23-89 receptor shall be as indicated in Table 1.

As the voice of the U. The following are technically similar to ISO Gloss Introduction – Page 5 What is Gloss? 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. Proceed to Checkout Continue Shopping. Place the rinsed standards in a warm oven to dry.

Rhopoint IQ Flex You may delete a document from your Alert Profile at any time. A study of the effect of geometric conditions on results of gloss tests with special attention to high-gloss panels.