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We will have the May day holidays from May 1 to May 5, will be back on May 6, 2024.
Contact person:Kitty Liang
Tel:+86-0771-2610277
+86 13481140850
Fax:+86-0771-2449722
E-mail: st-rosin@hotmail.com
Knowledge
Quality Index of High-hydrogenated Rosin (GB/T 14020-2006)
2010-03-11 Hits :3366 songtao business
Item
Extra grade
First grade
Appearance
transparent
Color
Color Requirements of STD Glass
Conform to Color Requirements of STD Glass for Rosin
No Deeper than Lovibond Color
Yellow
12
20
Red
1.4
2.1
Acid number (mgKOH/g)≤
164.0
160.0
Softening point(Ring-and-ball method)℃≥
73.0
72.0
Ethanol insolubles%≤
0.020
0.030
Non-saponifiable matter%≤
7.0
8.0
Abietic acid % ≤
0.5
1.00
Dehydroabietic acid % ≤
8.0
10.0
Oxygen absorptivIty % ≤
0.20
0.20
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