Item

Extra Grade X

First Quality WW

Second Grade WG

Third Grade N

Fourth Grade M

Fifth GradeK

Color

yellowish

light yellow

yellow

deep yellow

yellowish brown

yellowish red

Correspond to the standard glass color piece of rosin

Appearance

transparent solid

Softening Point(ball and ring method)°C, no lower than

76

75

74

Acid value(mgKOH/g), no less than

166

165

164

Unsaponifiable Matter Content(%), no more than

5

5

5

Ethanol insolubles (%), no more than

0.03

0.03

0.04

Ash(%), no more than

0.02

0.03

0.04