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Masking Techniques

Flow Coating

Basic Types of Masking Techniques
(Listed in preference for high production decorating.)

1). Lip Style

Used in depressed areas where paint is required to be deposited at the bottom of a recess, such as lettering and stripes, without secondary wiping or highlighting.

Width of opening should be a minimum of 3/32" (.093) to eliminate excessive mask washing time. Lips generally do not extend to bottom of recess, which permits numerous painting operations before mask washing.

2). Cap Style

This type of masking is used to keep a raised surface clean while the surrounding area is painted. Caps should not extend to bottom, providing more sprays per mask, reducing undesirable "halo" effect.

3). Block-Cut Style

This type of masking is employed for high production dial filling of letters and numerals, when the width of the groove is less than 3/32" (.093). This method is frequently employed with sprayed "Wipe-In" and "Dry-Wipe" dial filling materials.

4). Plug Style

This type of mask is used when recessed letters and numerals are to remain clear or clean while the balance of the background is painted. Requires extreme accuracy in the molded part. This type of mask is prevalent in second surface decoration of plastic components.

5). Engraved Masks

When application of a design is required on a flat surface, without recessed or raised lettering, it is feasible by careful control of the painting operation to use an engraved type mask. Typical products are balls, scale model trains, and racing cars.

6). Highlighting Masks

Occasionally it is not feasible to cap small letters or numerals, due to size, on a large painted area. A wiping or highlighting mask is provided that permits the raised surfaces to protrude for secondary wiping or buffing.

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