The origin of the resin can be recognized by its color. The pure French and North American resins have a light yellow color, while the pure German resin is brown. The pure natural resin is transparent, can be easily sprayed. It is soluble in alcohol and essential oils.
The pure resin undergoes various heating while the oil and other materials are added. This liquid is then poured into a mold to form the resin "cake" that the cellists use for the bow.
Each manufacturer has its own specific and secret procedure to make the resin. As a result, all resins on the market differ in quality and greatly impact the curvature technique and the sound color of an instrument. For the musician, it is important to carefully choose a resin that will help you have a more ideal "grip" of the bow while playing the strings.
You should always choose a high quality resin that will allow a perfect curl without harsh sounds, especially if only a thin layer of resin is applied. The resin used for cellos is a strong resin, less dry than that used on violins and violas and less soft than that used for basses.
Another important aspect for choosing the correct resin is the core material of which the ropes are made: for the steel ropes a hard, dry resin is used, for the synthetic or gut strings, a
