• Natural Pine Resin.
• Weight: 50 grams.
• Rosin is an ingredient in varnishes, glues, soap, paper sizing, soda, soldering fluxes, sealing wax..
• Dissolves in alcohol.
• Some of the pine resin may be in powder form due to brittle nature of the product.

Natural Pine resin, also called colophony. In industry, rosin is a flux used in soldering. The lead-tin solder commonly used in electronics has about 1% rosin as a flux core helping the molten metal flow and making a better connection by reducing the refractory solid oxide layer formed at the surface back to metal. It is frequently seen as the burnt or clear residue around new soldering. A mixture of pitch and rosin is used to make a surface against which glass is polished when making optical components such as lenses. Rosin is added in small quantities to traditional linseed oil/sand gap fillers, used in building work. When mixed with waxes and oils, rosin is the main ingredient of mystic smoke, a gum which, when rubbed and suddenly stretched, appears to produce puffs of smoke from the fingertips. Rosin is extensively used for its friction-increasing capacity in several fields: Players of bowed string instruments rub cakes or blocks of rosin on their bow hair so it can grip the strings and make them speak, or vibrate clearly.Rosin is often applied to the bow before playing the instrument. There are darker rosins for cellos and specific, distinguishing types for basses—for more see Bow (music). Violin rosin can be applied to the bridges in other musical instruments, such as the banjo and banjolele, in order to prevent the bridge from moving during vigorous playing. Ballet, flamenco, and Irish Dancers are known to rub the tips and heels of their shoes in powdered rosin to reduce slippage on clean wooden dance floors or competition/performance stages. Gymnasts use it to improve grip. Baseball pitchers and ten-pin ers may use small cloth bag of powdered rosin for better ball control. Fine art uses for tempera emulsions and as painting-medium component for oil paintings. Soluble in oil of turpentine and turpentine substitute; needs to be warmed. Rosin is sometimes used as an incredient in dubbing wax used in fly tying.