ASTM D823 PDF

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ASTM D Standard Practices for Producing Films of Uniform Thickness of Paint, Varnish, and Related Products on Test Panels. Standard Practices for. ASTM D – Designation: D – 95 (Reapproved ) Standard Practices for Producing Films o. Standard ASTM D The following devices are in accordance with ASTM D : ZAA Automatic Film Applicator Coater.

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NOTE 7—The operating conditions viscosity, percent of nonvolatile matter, and rate of withdrawal are speci? Place the auxiliary bar in front of the pool of material see Fig. If the coating thickness is too high, coat another panel using a smaller blade clearance. The panel holder or the gun mount traverse speed shall aetm adjustable from 7. As the auxiliary bar is pushed by the applicator, it should press astj substrate? Adjust the air pressure, material?

The values given in parentheses are for information only. NOTE 4—The width of the spray pattern should be considerably wider than the width of the test panel to assure spray uniformity on the test panel.

The viscosity range for normal? Start the motor-drive and coat the test panel.

If the coating thickness is too high, select an applicator blade with a smaller clearance and coat another panel. A suitable apparatus is aetm in Fig. Gradually make the spray pattern move across the panel at a traverse dd823 of to mm 10 to 15 in. Reduce the material to a viscosity suitable for spraying. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM Headquarters.

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ASTM D – Zehntner GmbH

Wind the cord once completely around the pulley of the correct size to give the desired rate of withdrawal. It is usually less reliable for producing uniform? The base plate shall hold paper charts? A number in parentheses indicates the year of last reapproval. Summary of Practice 9. Measure the temperature of the material in the container at the time of application.

Begin by aiming the gun at right angles to the panel so that the spray pattern is just beyond the edge of the panel.

Standard ASTM D823

Suitable apparatus, is shown in Fig. If the coating thickness is too high, coat another panel using a faster rate of panel withdraw. Subsequent reproduction of the same operating conditions should give the same? D283 is particularly important that it be used in the evaluation of metallic coatings for appearance properties, such as gloss and color. Originally published as D — 45 T. ASTM D e1. NOTE 11—Paper charts should be taped down to prevent curling of the edges that causes the wet?

NOTE 5—Rectangular containers F-style can with lid cut off are useful because the smaller exposed surfaces of the liquid coating reduces volatile loss. Current edition approved Nov. NOTE 9—Rigid panels shall be cleaned in an approved manner. Last previous edition D — 92a. Typical machines are shown in Fig.

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Preparation of Apparatus 6. If the coating thickness is too high, coat another panel with fewer passes of the spray pattern or, if this is not feasible, reduce the material further with thinner.

This machine can 1 move the panel holder, with test panel, at a uniform speed through the atomized spray produced by a? If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. NOTE 13—The width of the spray pattern should be considerably wider than the width of the test panel to assure spray uniformity on the test panel.

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. Use of a multiple hook will permit dipping several panels at one time. Insert the blade in the blade holder and load the holder with weights if needed. A superscript epsilon e indicates an editorial change since the last revision or reapproval. Bake, force-dry, or air-dry the coated panel, in accordance with its type, in a vertical position in a dust-free atmosphere in accordance with Speci?

The blade holder shall be designed to accommodate common types of applicator blades and to accept weights for loading the applicator blade.