FED-STD-141 Paint, Varnish, Lacquer And Related Materials: Methods Of Inspection, Sampling And TestingThis standard elaborates the methods used to determine the physical and chemical properties of paint, varnish, lacquer, and related materials. The purpose of this standard is to establish standardized testing methodologies and to eliminate unnecessary or undesirable variations in test results when evaluating a product??s adherence to specification requirements. If any variation or modification of the methods established in this standard is required by any specification, the procedures listed in the specification will take precedence. Any conflict between this standard and any particular specification will be resolved in favor of the specification.

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METHOD 4331.2

March 22, 2001

SPRAYING PROPERTIES

1. SCOPE

1.1 Scope. The following method outlines a procedure for checking the spraying properties of

coating materials. The method is very subjective and should be performed by an individual skilled

in the art of using a spray gun.

2. APPARATUS

2.1 Panel. A steel panel 4 by 12 inches or larger.

2.2 Spray gun. A spray gun capable of spraying the material under test.

3. REAGENTS

3.1 Reagents. None required.

4. PROCEDURE

4.1 Panel preparation. The steel panel shall be solvent cleaned.

4.2 Performance of test. The material shall be reduced according to the instructions in product

specification. While spraying, the gun shall be held perpendicular to the panel and moved in a

straight line across the face of the panel. The product specification shall state the distance from the

test panel to the gun. For lacquer and other quick drying materials the distance shall be between 6

and 8 inches. For slower drying materials the distance shall be 8 to 10 inches. Immediately place

the panel in a nearly vertical position.

4.3 Observations.

4.3.1 Wet panel. On the wet panel freedom from running, sagging, and fogging shall be noted.

4.3.2 Dried film. The dried film shall be free of dusting, pin holing, floating, cratering, mottling,

orange peel, bubbling, blushing, wrinkling, blooming, streaking, and silking.

5. PRECISION

5.1 Data. No data.

6. NOTES

6.1 Notes. None.

FED. TEST METHOD STD. 141D