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.

Use of a multiple hook will permit dipping several panels at one time. The blade holder shall be designed to accommodate common types of applicator blades and to accept weights for loading the applicator blade. Measure the temperature of the material in the container at the time of application. Originally published as D — 45 T.

ASTM D – Zehntner GmbH

Suitable apparatus, is shown in Fig. 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. This machine can 1 move the panel holder, with test panel, at a uniform speed through the atomized spray produced by a? Reduce the material to a viscosity suitable for spraying. 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.

Summary of Practices d23. Start the motor-drive and coat the test panel. If the coating thickness is too high, coat another panel using a faster rate of panel withdraw. Summary of Practice 9. 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.

The values given in parentheses are for information only. A machine equipped with a programmable system can index the spray gun vertically for multiple passes and for multiple coats with selective time delay. NOTE 9—Rigid panels shall be cleaned in an approved manner. It is more reliable for producing uniform? Asgm of Apparatus 6.

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? It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine awtm applicability of regulatory limitations prior to use.

A v823 shall be provided to stop the blade movement automatically at the end of the draw-down. A superscript epsilon e indicates an editorial change since the last revision or reapproval. It is usually less reliable for producing uniform? Hold the spray gun tip to mm 10 to 12 in.

Standard ASTM D823

Preparation of Apparatus Typical machines are shown axtm Fig. Summary of Practice Begin by aiming the gun at right angles to the panel so that the spray pattern is just beyond the edge of the panel.

This standard has been approved for use by agencies of the Department asym Defense. If the coating thickness is too high, select an applicator blade with a smaller clearance and coat another panel. The panel holder or the gun mount traverse speed shall be adjustable from 7. 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.

Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. Data are available3 on a variety of materials and? The viscosity range for normal?

Place the auxiliary bar in front of the pool of material see Fig. NOTE 7—The operating conditions viscosity, percent of nonvolatile matter, and rate of withdrawal are speci? The machine shall be designed to move the panel holder at a uniform speed past the? NOTE 3—Suitable traverse speeds for automative coatings usually range from A suitable apparatus is shown in Fig.

Last previous edition D — 92a. 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. Gradually make the spray pattern move across the panel at a traverse speed of to mm 10 to 15 in.

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