Weak top coats that are too thin and form no proper films. Also, by binders that are too soft and have insufficient water resistance.

Avoid top coats with dyes, give proper time to drying and always use binder tops which have good physical properties like Akral RF 403, Akral RF 901, RPU 075, RPU SW 260, RPU 205-C and Resofix G.

I t is caused by using finishing floats which are too hard or applied in very thick coats not completely dried or by drying of the finishes at excessive temperatures.

Apply soft binder solution according to article for leather requirement such as Akral RF 403, Akral RF 901 and Resofinish 1020.

A destination is made between yellowing under the influence of heat or an exposure to light. The light fastness of finishes depends on the dyes, pigments and binders. Yellowing due to heat is caused by products, which are affected by oxidations or ageing such as fatty substances. Plasticizers or nitro cellulose lacquers, It is particularly disturbing on white or pale leather.

Careful selection of products, which have good light fast and heat resistant properties like Akral RF 403, Akral RF 901,Resocryl SL and Lustratop Pigments.

Creases appear on leather, which are not smoothly fed into processing machines. Improper piling can also cause creases.

Make proper trimming of leather and improve the slip of finishing film by adding waxes like SFT F 6004, Prefondal K/72 and Prefondal AN/1.

Leather finished with simple brightening dyes of organic pigments. Staining may be caused by migration of these dyestuffs or pigments.

Careful selection of products or use less amount and good quality dyes and pigments like lacsuper and lustratops. Apply a barrier top coats' of polyamides to prevent migration like Alpatop CM 502.

Use of polymer binders, which are not cold resistant, very hard pigment finishes or top coats.

Always avoid the hard polymer binders and use those, which have good flexing properties like Akral RF 403, Akral AC 05, RPU 205 C.