Rosin

Rosin (CAS 8050-09-7), also known as gum rosin or yellow resin, is a natural resin derived from pine trees and refined for industrial use.

Where is Rosin used?

• Printing inks: rosin-based resins improve pigment dispersion and adhesion to substrates, influencing print quality
• Rubber: plasticizer and processing aid improving tack and workability in tire and rubber goods
• Paper sizing: applied with alum to control ink absorption and surface strength in packaging and printing grades
• Textile and leather finishing: controlled adhesion and film-forming properties
• It functions as a tackifier, binder, and plasticizer in formulations.

Good to know: Standard commercial grades are classified by color using the USDA/WW grading scale, from water-white (WW) to darker grades. Disproportionated rosin is a chemically modified form processed for enhanced stability.