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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Standard ASTM D823
A superscript epsilon e indicates an editorial change since the last revision or reapproval. A suitable apparatus is shown in Fig.
This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? It is particularly important that d8233 be used in the evaluation of metallic coatings for appearance properties, such as gloss and color.
The panel holder or the gun mount traverse speed shall be adjustable from 7. NOTE 13—The width of the spray pattern should be considerably wider than the width of the ashm panel to assure spray uniformity on the test panel.
Summary of Practice A number in parentheses indicates the year of last reapproval. It is more reliable for producing uniform? A machine equipped with a programmable system can index the spray gun vertically for multiple passes and for multiple coats with selective time delay. Adjust the air pressure, material?
The blade holder shall be designed to accommodate common types of applicator blades and to accept weights for loading the applicator blade.
Steel panels shall be prepared in accordance with the appropriate method in Practice D Bake, force-dry, or air-dry the ast panel, in accordance with its type, in a vertical position in a dust-free atmosphere in accordance with Speci? This machine can 1 move the panel holder, with test panel, at a uniform speed through the atomized spray produced by a?
Begin by aiming the gun at right angles atsm the panel so that the spray pattern is just beyond the edge of the panel. As the auxiliary bar is pushed by the applicator, it should press the substrate?
Start the motor-drive and coat the test panel. 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. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
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?
ASTM D – Zehntner GmbH
It is usually less reliable for producing uniform? Data are available3 on a variety of materials and? If the coating thickness is too high, coat another panel with fewer astj of the spray pattern or, if this is not feasible, reduce the material further with thinner.
NOTE 7—The operating conditions viscosity, percent of nonvolatile matter, and rate of withdrawal are speci? Insert the blade in the blade holder and load the holder with weights if needed. The base plate shall hold paper charts? Summary of Practices 3. A mechanism shall be provided to stop the blade movement automatically at the end of the draw-down.
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. 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.
NOTE 6—The test panels should not exceed mm 12 in. NOTE 11—Paper charts should be taped down to prevent curling of the edges that causes the wet? NOTE 9—Rigid panels shall be cleaned in an approved manner. Place the auxiliary bar in front of the pool of material see Fig. Subsequent reproduction of the same operating conditions should give the same?
Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. Preparation of Apparatus 6. 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.
Current edition approved Nov. Originally published as D — 45 T.
NOTE 3—Suitable traverse speeds for automative coatings usually range from Last previous edition D — 92a. If the coating thickness is too high, coat another panel using a smaller blade clearance. 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.