Leneta Test Charts

Checkerboard Charts / Spreading Rate Charts

One of the earliest hiding power test surfaces was linoleum with a black and white checkerboard pattern. This was soon replaced by sealed paperboard charts of which Forms 10H and 10H-BG Spreading Rate Charts are typical examples. Designed for brushout tests at specified spreading rates such as in ASTM Method D 344 and Canadian 1-GP-71, they are also used for drawdown applications like their smaller counterparts Forms 10A and 10B. Black and grey squares in Form 10H-BG provide reduced contrast for testing coatings with lower hiding power.

Request Info			Spreading Rate Charts Design Area = 1.076 ft2 (1000 cm2)
Form 10A 5-1/2 x 10 in 140 x 254 mm Design Area = 275 cm2	Form 10B 7-5/8 x 11-3/8 in 194 x 289 mm Design Area = 425 cm2
			Form 10H 11-1/4 x 17-1/4 in 286 x 438 mm	Form 10H-BG 11-1/4 x 17-1/4 in 286 x 438 mm