| Gum rosin
1.Specifications |
| Grade |
X |
WW |
WG |
N |
M |
K |
| Appearance |
Transparent Solid |
| Color |
slightly
yellow |
pale
yellow |
yellow |
deep
yellow |
yellow
brown |
yellow
red |
| Correspond to the Standard
Glass Color Piece of Rosin |
Softening Point
(R&B),°C, min |
76 |
75 |
74 |
Acid Value,
(mgKOH/g), min |
166 |
165 |
164 |
Alcohol insoluble
Substance ,(%) , max |
0.03 |
0.03 |
0.04 |
Unsaponifiable
matter, (%) ,max |
5 |
5 |
6 |
| Ash, (%) ,max |
0.02 |
0.03 |
0.04 |
| 2. Properties and uses:
It is a kind of natural resin, mainly composed of various kinds
of resin acids, it can be dissolved easily in many organic solvents,
and has special chemical activity. So it is an important raw material
for the production of paper, coatings, inks, rubber, soaps, electronic
industrial products, food grade ester gum, rosin ester resins etc.
3. Packing:
(1) Drum: Galvanized iron drum, 225kg net each drum.
(2) Bag: Intertexture or kraft paper bag, 25kg net each
bag.
4. Technical specification:
The above technical specification (GB 8145-87) is the national
standard of People's Republic of China. If there are changes, the
latest specification will be executed and assured by contract.
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