CN103710475A - Leather tanning technology - Google Patents

Abstract

The invention discloses a leather tanning technology. The leather tanning technology comprises the following steps of a, immersing 500g of dried animal leather in water in a water bucket for softening, b, taking out the softened animal leather and spreading the softened animal leather on a flat plate, wherein the hair side faces down, c, taking 300g of saturated limewater and adding 50g of sodium sulfide into the saturated limewater to obtain a depilation liquid, d, dipping the depilation liquid directly by a brush, doubling up the animal leather, keeping the state for about 3-4h, and completely removing hair by a shovel, e, putting the animal leather without hair into a color fixing agent, carrying out repeated kneading for uniform dipping, carrying out wringing drying and carrying out hanging airing, f, after depilation, immediately putting the animal leather without hair into flowing water for flushing so that most of lime and sodium sulfide are removed and immersing the animal leather in water for 1-2 days, g, adding about 2L of a saturated mirabilite solution into an iron pan, lightly heating the solution so that a temperature is kept at 40 DEG C, carrying out second and third mirabilite leaching after about 0.5h in the way the same as the first mirabilite leaching way, airing the animal leather subjected to mirabilite leaching and removing the redundant mirabilite on the animal leather, and h, adding 500g of boiled oil into an iron pan, heating the boiled oil so that a temperature of the boiled oil is kept at about 40 DEG C, and airing the animal leather on a wood rod so that the animal leather is dried naturally.

Description

A kind of leather tanning process

Technical field

The present invention relates to a kind of skin technique processed, is specifically a kind of leather tanning process.

Background technology

The tanning of leather is exactly, by tannin, the protein of intracutaneous is carried out to chemistry and Physical Processing, it passes through series of process, and adopt some chemical agents, and make the protein in the animal hides such as ox, pig, sheep that a series of variations occur, make collagen protein generation Denaturation.Tanned leather is both soft, firm, wear-resisting again, is not easy putrid and deteriorated.

Summary of the invention

Technical problem to be solved by this invention is just to provide a kind of leather tanning process, and this process for tanning is easy and simple to handle, and the skin leather that tanning goes out is soft, firm and wear-resisting.

For achieving the above object, the present invention adopts following technical scheme: a kind of leather tanning process, is characterized in that: comprise the following steps successively:

A) the dry animal skin of 500g is immersed in bucket to soft;

B) take out the skin of deliquescing, be spread out in flat board upper, hair side down, is rooted out meat attached on skin and oil totally with perching knife;

C) then get 300g saturated limewater, add 50g sodium sulphite, stir, make depilatory solution;

D) then with brush, dip depilatory solution, brush, at skin wool root, as far as possible evenly, then leather doubling, approximately through 3～4 hours, is sloughed hair with scoop during brush completely;

E) then put into laking agent and repeatedly knead again, after approximately ten minutes, wring out hanging;

F) after depilation, immediately skin is placed in flowing water and is rinsed, remove most lime, sodium sulphite, then in water, soak 1～2 day;

G) a standby iron pan, add the about 2L of saturated saltcake solution, slightly heating makes solution temperature remain on 40 ℃, from clear water, take out leather, after wringing out, put into pot, with hand, constantly rub skin, dry, after about half an hour, carry out second, third time again and eat nitre, method, with identical for the first time, is dried the skin of eating after nitre rear except the floating nitre in peeling;

H) an another standby iron pan, adds 500g edible vegetable oil, and heating makes oil temperature remain on 40 ℃ of left and right, the skin of eating after nitre is put into warm oil, with ceaselessly push-and-pull of hand, make oil constantly contact, infiltrate equably in dermatotome with skin, eat after sufficient oil, skin is dried in the air on wooden stick, it is dried in the shade naturally.

Leather tanning process of the present invention passes through series of process, and adopts some chemical agents, makes the protein in the animal hides such as ox, pig, sheep that a series of variations occur, and makes collagen protein generation Denaturation.Tanned leather is both soft, firm, wear-resisting again, is not easy putrid and deteriorated.

Embodiment

Leather tanning process embodiment 1 of the present invention, comprises the following steps successively:

A) the dry animal skin of 500g is immersed in bucket to soft;

B) take out the skin of deliquescing, be spread out in flat board upper, hair side down, is rooted out meat attached on skin and oil totally with perching knife;

C) then get 300g saturated limewater, add 50g sodium sulphite, stir, make depilatory solution;

D) then with brush, dip depilatory solution, brush, at skin wool root, as far as possible evenly, then leather doubling, approximately through 3～4 hours, is sloughed hair with scoop during brush completely;

E) then put into laking agent and repeatedly knead again, after approximately ten minutes, wring out hanging;

F) after depilation, immediately skin is placed in flowing water and is rinsed, remove most lime, sodium sulphite, then in water, soak 1～2 day;

G) a standby iron pan, add the about 2L of saturated saltcake solution, slightly heating makes solution temperature remain on 40 ℃, from clear water, take out leather, after wringing out, put into pot, with hand, constantly rub skin, dry, after about half an hour, carry out second, third time again and eat nitre, method, with identical for the first time, is dried the skin of eating after nitre rear except the floating nitre in peeling;

H) an another standby iron pan, adds 500g edible vegetable oil, and heating makes oil temperature remain on 40 ℃ of left and right, the skin of eating after nitre is put into warm oil, with ceaselessly push-and-pull of hand, make oil constantly contact, infiltrate equably in dermatotome with skin, eat after sufficient oil, skin is dried in the air on wooden stick, it is dried in the shade naturally.

Above-described embodiment is to explanation of the present invention, is not limitation of the invention, any scheme after simple transformation of the present invention is all belonged to protection scope of the present invention.

Claims (1)

1. a leather tanning process, is characterized in that: comprise the following steps successively:

A) the dry animal skin of 500g is immersed in bucket to soft;

B) take out the skin of deliquescing, be spread out in flat board upper, hair side down, is rooted out meat attached on skin and oil totally with perching knife;

C) then get 300g saturated limewater, add 50g sodium sulphite, stir, make depilatory solution;

D) then with brush, dip depilatory solution, brush, at skin wool root, as far as possible evenly, then leather doubling, approximately through 3～4 hours, is sloughed hair with scoop during brush completely;

E) then put into laking agent and repeatedly knead again, after approximately ten minutes, wring out hanging;

F) after depilation, immediately skin is placed in flowing water and is rinsed, remove most lime, sodium sulphite, then in water, soak 1～2 day;

G) a standby iron pan, add the about 2L of saturated saltcake solution, slightly heating makes solution temperature remain on 40 ℃, from clear water, take out leather, after wringing out, put into pot, with hand, constantly rub skin, dry, after about half an hour, carry out second, third time again and eat nitre, method, with identical for the first time, is dried the skin of eating after nitre rear except the floating nitre in peeling;

H) an another standby iron pan, adds 500g edible vegetable oil, and heating makes oil temperature remain on 40 ℃ of left and right, the skin of eating after nitre is put into warm oil, with ceaselessly push-and-pull of hand, make oil constantly contact, infiltrate equably in dermatotome with skin, eat after sufficient oil, skin is dried in the air on wooden stick, it is dried in the shade naturally.