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Rublev Colours Gum Rosin (Staybelite A) 500g

SKU: NAP-510-33HRG50
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Staybelite A resin is gum rosin that has been partially hydrogenated via a catalytic process. It is a pale, thermoplastic, acidic resin. Hydrogenation makes rosin highly resistant to oxidation and discoloration, and to changes in solubility, when exposed to air and heat. In these respects, Staybelite A is greatly superior to non-hydrogenated rosin. Metallic salts and other derivatives of Staybelite resin inherit this stability to a large degree. The softening point of Staybelite resin is slightly lower than that of non-hydrogenated rosin; otherwise, its solubility and compatibility characteristics are similar to rosin.


Staybelite A is superior to gum rosin in that it has exceptionally pale color, is resistant to oxidation and discoloration, and has a wide solubility and compatibility range greater than ordinary non-hydrogenated rosin.


• Component in thermoplastic mixtures for polishing wax, sealing wax and encaustic wax.
• Used in the preparation of synthetic resins and metal resinates.
• Used in most applications where gum rosin is used.

CAS Number 65997-06-0
Color (USRG Rosin Scale) X
Softening Point (Ring and Ball) 73° C
Acid Number 158
Refractive Index (at 100° C) 1.5007
Density (at 25° C) 8.7 lb/gal (1.045 kg/l)
Abietic Acid <3%

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