Test requirement for Fancy and Fine leather

The leather types of this group are manufactured mainly from small animal skins and calf skins, to a lesser extent also from cattle hide, often from thinner flanks, and a wide rang of wild skins. The latter are especially interesting for fashionable leather because of their special grain patterns. Almost all types of tannage are used for making these leathers, however vegetable/ synthetic tanning and retanning are the most common processes. Likewise, most of the finishes are applied as smooth or embossed finishes and many special effect finishes.

Test	Requirments-Fancy leather
	vegetably tanned	Chrome tanned	Combination tanned
fat content	5-10 %
ash content	max. 2.5%	max.2.0 % (above content of tanning oxides
substance removable	max.8.0 %	max. 2.0 %	max.7.0 %
by washing
tanning oxides		min. 2.0 %	min.   0.6 %
degree of tanning	min  50
pH value extract	min. pH 3.5
tensile strength N/cm²	up to 1.25 mm min. 1000; above min.1500		min. 1500
elongation at break	max. 50 %	max. 75 %
thorn bending test	up to a bending angle of 180 ⁰ no cracking of the leather or grain
flexing endurance	min.  1000 flexing without cracks
adhesion fastness	min. 2.50 N/cm
rub fastness
50 cycles dry
20 cycles wet	min. rating 3
20 cycles with perspiration
solution