Soft and Fluffy Leather:
There are few guide lines that one can follow:
There are few guide lines that one can follow:
- Check the source of wet blues to determine whether the dosage of chemicals.
- Proper wetting back is a prerequisite. Proper wetting back means good opening of fibrils in the corium so that they will not resist penetration of chemicals in the process.
- Choice of retanning materials are of essence because one cannot do heavy retanning on this type of leather or it will destroy the desire chrome character, but at the same time one still need good fill up of leather, which chrome leather is short of.
- Choice of fatliquors and it’s combinations is the most important because fatliquor plays a crucial role in softening, filling, influence surface feels, mellowing, and, etc..
- Drying, conditioning, and milling are equally important for the final outcome of leather.
- Wetting back: In order to do proper wetting back we believe one should follow these simple rules.
- Proper wetting back of wet blues: Alchem CSAM will help to equalize pH, wetting back, and bleaching of wet blues. Alchem 325W will help opening the fibrils in the corium.
- Proper calcium removal from wet blue interiors because with presence of calcium, leather will have the tendency of being stiffs, regardless of choice of fatliquors. Alchem DW will help eliminate residue calcium in the inner part of leather.
- Surface chrome removal, without affecting the inner fixed chrome, is quite important for enzymes to work. ALCHEM CA will work only on the surface chrome on the grain by stripping surface chrome, leaving under tan grain for enzyme to work. This way, the interior is still full and round not empty like when oxalic is used.
- Choice of retanning or tanning auxiliaries:
- Altan MS, a chrome complexing agent, which will help enlarging chrome molecules in order to make leather fuller without affecting chrome character of leather.
- Altan T, oxazoldin based chemical, will help in plumping and inner hide filling without affecting the chrome character.
- Good dispersing syntan is quite important, one should select minimum bleaching, good filling, and with mild astringency.
- Choice of fatliquors and its combination will very much depend on the types of wet blues we are working. For this case, we shall take cow.
- Eurekanol 6SKT in the neutralizing bath is the best choice.
- Silikanol 1102, Silikanol DSJ, and Yolkanol L5TC are probably the best fatliquor combination as main fatliquor operation.
- Silikanol S 2733D as topping fatliquor is a must.
- Drying, conditioning, and milling are equally important.
- It is very important that no mechanical action is done after leather came out from drum.
- After complete drying, condition and enough dry milling for achieving the desire effect.