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Gum Rosin
Gum rosin good quality ,colophony ,gum rosin ww grade ,gum rosin x grade,gum rosin wg grade
Specification:

Parameter
Grade

Standard: GB/T8145-8146-2003
X
WW
WG

APPEARANCE
Transparent
Transparent
Transparent

COLOR
Light Yellow
Pale Yellow
Yellow

SOFTENING POINT(R&B)°C
76.0
76.0
75.0

ACID NUMBER(mg KOH / g)=
166.0
166.0
165.0

UNSAPonIFIABLE MATTER % =
5.0
5.0
5.0

ETHANOL INSOLUBLES % =
0.030
0.030
0.030

ASH ConTENT % =
0.020
0.020
0.030