For promoting leafing with aluminum pigments, which application pattern is recommended?

• A. In one direction only
• B. In multiple passes in different directions
• C. With a swirling pattern
• D. In a crosshatch pattern

Answer: (A)

Leafing aluminum pigments are designed to lie flat and align parallel to the surface, maximizing a bright, continuous metallic sheen. When you apply in a single direction, the flakes are sheared and oriented uniformly as they settle, creating a consistent, high-reflectivity finish.

Using multiple passes in different directions or any pattern that changes direction disturbs that orderly orientation. Flakes get reoriented randomly or at angles, which dulls the luster, can cause streaks or a speckled look, and overall reduces the leafing effect. A swirling or crosshatch pattern disrupts the flat, uniform orientation even more, leading to an inconsistent metallic appearance.

So, the best approach is to apply in one direction only to preserve the smooth, reflective leafing finish.