Rosin (Premium) AT25 Hardness and Brightness Paint Production of Various Modified Rosin Resins
Rosin generally refers to gum rosin, an oil exuded from tree trunks. After dissolution, clarification, and distillation, dries into a solid block (without a fixed melting point). Its color ranges from light yellow to reddish-brown. As a vital chemical raw material, it is primarily used in daily life as a flux for soldering circuit boards and as a hair remover. In musical instruments, rosin is applied to the bow hair of bowed string instruments like the erhu, violin, and horsehead fiddle to incre
Appearance: Light yellow transparent block
Color: Yellow (meets glass standard color block requirements for rosin grades)
Softening Point (Ring and Ball Method), °C: 75-90
Acid Value (mg KOH/g): 140-150
Unsaponifiable Matter Content, %: ≤ 5
Ethanol-Insoluble Matter, %: ≤ 0.03
Ash Content, %: ≤ 0.03
- Parameters
Appearance: Light yellow transparent block
Color: Yellow (meets glass standard color block requirements for rosin grades)
Softening Point (Ring and Ball Method), °C: 75-90
Acid Value (mg KOH/g): 140-150
Unsaponifiable Matter Content, %: ≤ 5
Ethanol-Insoluble Matter, %: ≤ 0.03
Ash Content, %: ≤ 0.03
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