ASTM D823 PDF

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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This standard has been approved for use by agencies of the Department of Defense. The base plate shall hold paper charts? The values given in parentheses are for information only.

Data are available3 on a variety of materials and? Suitable apparatus, is shown in Fig. NOTE 7—The operating conditions viscosity, percent of nonvolatile matter, and rate of withdrawal are speci? Originally published as D — 45 T. It is applicable to the coating of smooth cardboard and paper charts if some means is used to assure that these substrates are held?

The viscosity range for normal? 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.

It is usually less reliable for producing uniform? Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM Headquarters. Preparation of Apparatus NOTE 9—Rigid panels shall be cleaned in an approved manner. It is the responsibility of the user astj this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Adjust the air pressure, material? This machine can 1 move the panel holder, with test panel, at a uniform speed through the atomized spray produced by a? A mechanism shall be provided to stop the blade movement automatically at the end of the draw-down. 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. Begin by aiming the gun at right angles to the panel so that the spray pattern is just beyond the edge of the panel.

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A machine equipped with a programmable system can index the spray gun vertically for multiple passes and for multiple coats with selective time delay. ASTM D e1. Start the motor-drive and coat the test panel. A superscript epsilon e indicates an editorial change since the last revision or reapproval. A number in parentheses indicates the year of last reapproval. The panel holder or the gun mount traverse speed shall be adjustable from 7. 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?

Summary of Practice Last previous edition D — 92a. The blade holder shall be designed to accommodate common types of applicator blades and to accept weights for loading the applicator blade.

NOTE 11—Paper charts should be taped down to prevent curling of the edges that causes the wet? 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.

Standard ASTM D823

Place the auxiliary bar in front of the pool of material see Fig. Hold the spray gun tip to mm 10 to 12 in. If the coating thickness is too high, coat another panel using a smaller blade clearance. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Summary of Practices 3. Typical machines are shown in Fig.

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Preparation of Apparatus 6. Summary of Practice 9. Wind the cord once completely around the pulley of the correct size to give the desired rate of withdrawal. Use of a multiple hook will permit dipping several panels at one time.

Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.

Steel panels shall be prepared in accordance with the appropriate method in Practice D Reduce the material to a viscosity suitable for spraying. If the coating thickness is too high, coat another panel using a faster rate of panel withdraw. It is more reliable for producing uniform? NOTE 6—The test panels should not exceed mm 12 in.

NOTE 5—Rectangular xstm F-style can with lid cut off are useful because the smaller exposed surfaces of the liquid coating reduces volatile loss. Measure the temperature of the material in the container at the time of application. 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.

ASTM D – Zehntner GmbH

Prior to withdrawal, the panel, attached to the cord, is lowered by hand into the container holding the material. Current edition approved Nov. NOTE 3—Suitable traverse speeds for automative coatings usually range from 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.

Insert the blade in the blade holder and load the holder with weights if needed. Adjust the adtm pressure material?