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
COLOR
Light Yellow
Pale Yellow
Yellow
SOFTENING POINT(R&B)°C
76.0
75.0
ACID NUMBER(mg KOH / g)≥
166.0
165.0
UNSAPONIFIABLE MATTER % ≤
5.0
ETHANOL INSOLUBLES % ≤
0.030
ASH CONTENT % ≤
0.020
Content(tio2)% ----------------------------- --------- ------- 98Min
< div>Oil Absorption (g/<100g>) ------- --- -------------26 Max