Tangent Screen testing surface is best described as what material?

• A. White glossy screen
• B. Black or gray matte-finished cloth such as felt or velvet
• C. Clear glass
• D. Red velvet cloth

Answer: (B)

The tangent screen needs a surface that minimizes glare and provides a neutral, non-reflective background so the test targets and any light reflexes can be observed clearly. A black or gray matte-finished cloth such as felt or velvet is ideal because its surface absorbs light rather than reflecting it, reducing glare and hotspots and giving a consistent background that won’t alter perceived contrast or color.

White glossy screens reflect room light, creating glare that can wash out details. Clear glass reflects the surroundings and can distort the test. Red velvet, while soft, introduces color tint and uneven absorption, which can affect contrast and accuracy.