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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NOTE 7—The operating conditions viscosity, percent of nonvolatile matter, and rate of withdrawal are speci? The viscosity range for normal? Summary of Practice 9. A mechanism shall be provided to stop the blade movement automatically at the end of the draw-down. Last previous edition D — 92a.
If the coating thickness is too high, select an applicator blade with a smaller clearance and coat another panel. Typical machines are shown in Fig. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM Headquarters.
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 d23 below. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.
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. If the coating thickness is too high, coat another panel with fewer xstm of the spray pattern or, if this is not feasible, reduce the material further with thinner.
Subsequent reproduction of the same operating conditions should give the same? 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. Suitable apparatus, is shown in Fig.
Insert the blade in the blade holder and load the holder with weights if needed. It is usually less reliable for producing uniform? A number in parentheses indicates the year of last reapproval. The machine shall be designed to move the panel holder at a uniform speed satm the? Summary of Practices 3.
Standard ASTM D823
Hold the spray gun tip to mm 10 to 12 in. As the auxiliary bar is pushed by the applicator, it should press the substrate? Summary of Practice Preparation of Apparatus 6. The blade holder shall be designed to accommodate common types of applicator blades and zstm accept weights for loading the applicator blade. A suitable apparatus is shown in Fig. Use of a multiple hook will permit dipping several panels at one time.
A machine equipped with a programmable system can index the spray gun vertically for multiple passes and for multiple coats with selective time delay.
If the coating thickness is too high, coat another panel using a smaller blade clearance. Preparation of Apparatus Wind the cord once completely around the pulley of the correct size to give the desired rate of withdrawal.
Start the motor-drive and coat the test panel. Operate the spray gun so that it will begin spraying a few seconds before the test panel asm the spray pattern and continue spraying a few seconds after the test panel leaves the astj pattern. 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?
ASTM D – Zehntner GmbH
The values given in parentheses are for information only. 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 11—Paper charts should be taped down to prevent curling of the edges that causes the wet? Gradually make the spray pattern move across the panel at a traverse speed of to mm 10 to 15 in. This standard is subject to revision at aztm time by the responsible technical committee and must be reviewed every? Begin by aiming the gun at right angles to the panel so that the spray pattern is just beyond the edge of the panel.
Current edition approved Nov. Place the auxiliary bar in front of the pool of material see Fig. 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? Originally published as Atsm — 45 T.