gum rosin

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rosin, colophony

A resin obtained as a residue in the distillation of crude turpentine from the sap of pine trees (gum rosin) or from an extract of the stumps and other parts of them (wood rosin).
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
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China has abundant pine resources, which guarantees sufficient oleoresin for gum rosin production.
Ingredient Quantity (phr (a)) Natural rubber (STR 5L) 100 ZnO 5 Stearic acid 2 N220 40 N550 30 Aromatic oil 12 TMQ 2 6PPD 2 Petroleum resin 0, 4, 8, 12 Phenolic resin 0, 4, 8, 12 Gum rosin 0, 4, 8, 12 TBBS 1 sulfur 2 (a.) phr, parts per hundred of rubber.
Siegwerk of Germany reported in October that gum rosin prices had gone up by 40% in a few weeks, significantly raising the cost of its portfolio of publication gravure, heatset and coldset inks.
"Secondly, gum rosin prices out of China have risen by more than 70% in 2013 as gum sellers and traders have been attempting to force a rebound in prices," Mr.
In particular, crude oil, gum rosin, titanium dioxide, nitrocellulose and pigments are of concern.
"The world-wide gum rosin price run-up of the past few years will not soon be forgotten," Mr.
"We would also highlight gum rosin and titanium dioxide ([TiO.sub.2]) as two other raw material categories where, due to potential limits on supply, fluctuations in demand can quickly translate into sharply higher costs," Mr.
"However, due to the bigger diversity of applications and hence raw materials used in packaging the exposure to a specific supply-side issue - like, for instance, gum rosin - tends to have somewhat less of an impact on the overall segment than in publication."
The prices of inorganies, especially titanium dioxide, vegetable oils and gum rosin, were also continuing to go up.
Global gum rosin supply continues to be challenged.