Catgut down to the desired diameter using a centerless grinder. After drying and polishing, workers bleach and disinfect the strings using sulfur dioxide, dye them if necessary, and sort them into sizes. Catgut sutures are normally treated with a chromium salt solution to resist body enzymes, to slow the absorption process, and are called catgut chromic sutures—whereas untreated catgut sutures are called catgut plain sutures. Catgut Catgut is a type of cord that is prepared from the natural fibre found in the walls of animal intestines. Catgut makers usually use sheep or goat intestines, but occasionally use the intestines of cattle,
Trembita Musical Instrument Factory 19 instruments were made. These instruments were diatonically tuned with 34 strings, however they did not have sufficient volume and did not allow the player to play in different keys easily. Continual serial manufacture of banduras was set up in 1964. Vasyl Herasymenko developed an acceptable model instrument and also developed a serial process for the mass production of banduras. From 1964-68 some 300 experimental instruments were produced. These instruments became known as the "Lviviankas" . The first models had 58 strings which included 17 bass strings. This particular instrument differed from counterparts made at the Chernihiv Musical Instruments Factory