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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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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. Adjust the air pressure, material? Connect the air line hose from the regulator to the air pressure gage which in turn is connected to the air inlet of the spray gun. Data are available3 on a variety of materials and? If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Astj on Standards, at the address shown below.

A suitable apparatus is shown in Fig. Summary of Practice The machine shall be designed to move the panel holder at a uniform speed past the? If the coating thickness is too high, coat another panel using a smaller blade clearance. NOTE 9—Rigid panels shall be cleaned in an approved manner.

NOTE 7—The operating conditions viscosity, percent of nonvolatile matter, and rate of withdrawal are speci? This standard is subject to revision at any time by the responsible technical committee and must be reviewed every?

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A superscript epsilon e indicates an editorial change since the last revision or reapproval.

It is particularly important that it be used in the evaluation of metallic coatings for appearance properties, such as gloss and color. Insert the blade in the blade holder and load the holder with weights if needed. A mechanism shall be provided to stop the blade movement automatically at the end of the draw-down. Typical machines are shown in Fig.

Last previous edition D — 92a.

ASTM D – Zehntner GmbH

ASTM D e1. The blade holder shall be designed to accommodate common types of applicator blades and to accept weights for loading the applicator blade. 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. Originally published as D — 45 Aatm. 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.

Summary of Practice 9. Hold the d8223 gun tip to mm 10 to 12 in. Begin by aiming the gun at right angles to the panel so that the spray pattern is just beyond the edge of the panel. A machine equipped with a programmable system can index the spray gun vertically for multiple passes and for multiple coats with selective time delay.

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The values given in parentheses are for information only. The panel holder or the gun mount traverse speed shall be adjustable from 7. 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. Preparation of Apparatus 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.

NOTE 6—The test panels should not exceed mm 12 in. Wind the cord once completely around the pulley of the correct size to give the desired rate of withdrawal.

Standard ASTM D823

Use of a multiple hook will permit dipping several panels at one time. It is usually less reliable for producing uniform? It is more reliable for producing uniform? Awtm number in parentheses indicates the year of last reapproval. Reduce the material to a viscosity suitable for spraying. Adjust the air pressure material?

Prior to withdrawal, the panel, attached to the cord, is lowered by hand into the container holding the material.