Essentially in the leather tanning industry there are four main stages of the process : beemhouse, tanning, Re-Tanning / Dyeing and finishing.

Each of these stages consists of several kinds of processes, each process requires additional chemicals and in general requires a lot of water, depending on the type of crude leather used and the desired skin types.

CV Yogya Karya andini only carry out the process that starts from the tanning up to finishing.

TANNING

Tanning aims to transform pickle are easy damaged by the activity of microorganisms or physical chemist to be wet blue was more resistant from that influence.

The principal mecanism of tanning skin is the inclution of certain material called tanning ingredient in to the skin of the fiber network, and the result is bonding chemical between the fiber material with a leather tanner. The phisycal characteristic of the skin will change to be better when compare with the raw skin (such us: the nature of enervation, resistant to heat / cold friction)

Skin that unstable before can be more stable to temperature, chemicals, fractions and friction also make the skin resistant to the influence of microbes.

RETANNING  / DYEING

Retanning is intended to provide a better superior properties ownwd other tanning materials. Materials used in this process is the material tanner synthesis, vegetable or mineral.

the following product groups were developed for retanning chrome tanned leather and are still mainly used for this purpose. But some of them have a strong affinity to the collagen and are therefore increasingly used in metal free combination tannages.

Basic dyeing process (Dyeing)

This process aims to provide the basic color of the skin was tanning to make beautify the appearance of finished leather and the using of lid paint not too thick so the paint does not easily broken.

Materials used include water, leveling agent, paint base, formic acid.

FINISHING 

Final settlement aims to beautify the appearance of finished leather, leather reinforces the basic color, polish, smoothing the appearance of the skin and tattoo cover defects or color paint an uneven base.

The action after finishing is spray dyeing, rolling, pressing, lackuering, antiquing, waxing, buffing, embossing, glazing, waterproofing or flame proofing.

We can do all of the process mentioned above with the facilities that support for each process