Finishing of leather

Finishing
the final stage of leather production i s reached with the finishing process.these treatment have the purpose of making the leather usable and suitable for the manufature of end of products.

properties of finished leather

1. Desired fashionable shade in transparent ,covering or effect finishes.
2. High-glass ,semimatt or matt topcoat.
3. Dry, waxy greasy or blunt surface handle.
4. Leveling of stain patches and grian defects.
5. Protection against soiling, moistur and processing chemical,to keep non puterfied, protection against chemical used in the manufature of end products.
6. Application of a fully covering artificial grain layer to spilts and corrected grain leathers.
7. Structure of finishes (schematic)
   The finish consists of basically three coats:
   
   1.Base coat -----2. middle coat (pigment coat) ----3. top coat
8. 
   These coat considerably apply but not essentially applied the application depend on article (type of leather) you are going to produce. It is possible to choose intermediate stages or to apply the top coat on its own. Basically softer products are chosen for the bottom layers and harder and more resistant products for the final caot.

Aniline leather---Samianiline ---rainlleather---corrected grain leather---split leather

---------------top coat-----------top coat --------top coat -----top or film

top coat------transparent pig.coat--pig.coat----covring.pig.coat---covring pig.coat

aniline dying--light color base coat---covring base coat----impregnation&base coat---thick covring base coat

Curtain coating finishing
These finishes are applied by means of the overflow or slot-type curtain coater. Mostly used for leather which need a high covering top coat such as corrected grain leather or split. It is used to cover more visible leather defects which come from beam house.
Roll coating finish
In this type of finishing the coat is applied to obtain effect finishes by mean of screen rolls or engraved pattern rolls. A different kind of finishing effect is obtain by this method more attractive finish and less quantity of chemical is used.