SU41112A1 - A method of processing horkov skins for parchment for making upright racing - Google Patents

Description

The invention aims at a method of making parchment from rhinestone skins for upper-combat races. A new method consists in the developed method of making parchment.

For the production of parchment, the selection of production batches of hats (not castrated or late castrated producers) is made. The selection of hides for making parchment skins is made by weight, area, density, type of canning, and rock.

For processing, parchment skins are picked up by weight of 18 kg and above. Fluctuations in weight between the skins of the production batch are allowed up to 10%. The weight of the production batch is selected depending on the equipment and compliance with the liquid coefficients described below. Before washing out of the skins, machines are pulled out of w, etina.

Soaking Before washing the hides, rinse in the drum with running water for 1 hour. T-ra wash water from 15 to 18 °. After washing

skins are loaded for soaking into a vat in fresh water; temperature of the saline water 15-14 °; g. v. 1: 5. After 4 hours from the start, the skins give bulkheads and change of water. After 24 hours, the skins are soaked. Fleshing is carried out manually by a scythe with a rolled sting without cutting off the thickened skin areas.

After patching, the skins are again dropped into the vat into fresh water. After 8–10 hours from the start of the second soaking skins, a bulkhead with a change of water is given. After 24 hours from the start of the second soaking of the wet-saline raw material, the normal: ground wash is finished.

The total period of soaking is 48 hours.

With a greater use of wet-salted raw materials against the norms, the soaking period is extended for another 24 hours with one bulkhead and water change.

Gilding After soaking skins come in ash vats. The composition of the fresh head ash pan:

sulphurous soda .... 7 g

lime CaO10 g1l

T-ra ash liquid -20-22 °, well. to 1: 4.

Zolka pelts is held for 5 days according to the principle of the juice stroke through the system of a circle of 6 vats with a fresh solution of a sliding head vat. Transfer of skins from the vat to the vat is daily. The ash liquid is completely drained and the tail ash is cleaned after 5 days from the preparation of the head-bath solution. In the place of the drained liquid, a fresh ash pan is turned on, which becomes the head one. The content of NagS and CaO in the first two ash pits from the head is maintained in the rates indicated for the head tank by means of supports.

After five days of ashing and upholstery on decks of bristle residues, the char comes into the second ash system (glutton) with pure lime, containing 10 g of CaO in 1 liter. The duration of a glutton is 4 days, with daily bulkheads and a daily change of fluid from the tail ash pan, in place of which fresh head ash pan is replaced.

The period of operation of the ash liquid from the moment of its preparation to the change and cleaning of the tank is 4 days. By lowering the above CaO concentration in the first two head ash pans, lime mortar is reinforced when transferring the fish from the tank to the tank.

Glutting is carried out at t-re 15-20 ° and g. v. 1: 4.

After the glutton, the shrine is fed by flushing with running water in the outboard drum. Washing is carried out at a t-re water of 15-20 ° for 40 minutes.

Drying. After washing, the cinder is dried. Drying is carried out on the poles with a peck of bakhtarma, out. Drying is carried out at a temperature of up to 35 °. The dried semi-finished product to a moisture content of 16-18% is removed from the poles and transferred to the finished goods warehouse.

The subject matter of the invention.

The method of processing hrkov skins for parchment for making upright reaming races, wherein the bristles are mechanically removed before washing and rinsed for about an hour in the drum in running water, then subjected to washing at a water temperature of about 15 °, drain the water after 4-8 hours with shredding in the middle of the process of soaking, which is carried out for 2-3 days, after which the skins are subjected to zolka at a temperature of about 20 ° in a bath containing lime and sodium sulfide, with a daily bulkhead of the skins from an older vat more fresh, and zolkabath containing a lime, also with daily bulkhead of the older more ash, and then washed and dried pelts.