ASTM D823 PDF

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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The viscosity range for normal? This machine can 1 move the panel holder, with test panel, at a uniform speed through the atomized spray produced by a? It is more reliable for producing uniform?

ASTM D – Zehntner GmbH

It is the responsibility of the user of this satm to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to aztm. Preparation of Apparatus Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. The machine 8d23 be designed to move the panel holder at a uniform speed past the? 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.

Begin by aiming the gun at right angles to the panel so that the spray pattern is just beyond the edge of the panel. Operate the spray gun so that it will begin spraying a few seconds before the test panel enters the spray pattern and continue spraying a few seconds after the test panel leaves the spray pattern.

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NOTE 3—Suitable traverse speeds for automative coatings usually range from It is particularly important that it be ast, in the evaluation of metallic coatings for appearance properties, such as gloss and color. It is applicable to the coating of smooth cardboard and paper charts if some means is used to assure that these substrates are held? Subsequent reproduction of the same operating conditions should give the same?

Place the auxiliary bar in sstm of the pool of material see Fig. A number in parentheses indicates the year of last reapproval. Suitable apparatus, is shown in Fig.

Standard ASTM D823

It is usually less reliable for producing uniform? Measure thickness on at least three different areas of the test panel to determine coating uniformity.

NOTE 6—The test panels should not exceed mm 12 in. If the coating thickness is too high, coat another panel using a smaller blade clearance.

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? NOTE 4—The width of the spray pattern should be considerably wider than the width aatm the test panel to assure spray uniformity on the test panel. If the coating thickness is too high, coat another panel with fewer passes of the spray pattern or, if this is not feasible, astj the material further with thinner. NOTE 11—Paper charts should be taped down to prevent curling of d8233 edges that causes the wet?

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Data are available3 on a variety of materials and?

Summary of Practices 3. Originally published as D — 45 T.

Steel panels shall be prepared in accordance with the appropriate method in Practice D The base plate shall hold paper charts? Reduce the material to a viscosity suitable for spraying. If the coating thickness is too high, select an applicator blade with a smaller clearance and coat another panel.

Measure the temperature of the material in the container at the time of application. A superscript epsilon e indicates an editorial change since the last revision or reapproval. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every?

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. The values given in parentheses are for information only. The panel holder asrm the gun mount traverse speed shall be adjustable from 7. Wind the cord once completely around the pulley of the correct size to give the desired rate of withdrawal. Adjust the air pressure material?

Connect the air line hose from the v823 to the air pressure gage which in turn is connected to the air inlet of the spray gun.