<![CDATA[The purpose of this study is to determine the physical character of vegetable tanned sheep using gambir (uncaria gambir). Twelve pieces of sheep pikel skin were tanned using 25% vegetable tanning material from three types of gambir (A, B, C) and two kinds of tanning formulations ((Std) and (Std + Aux)). Skin products were tested for physical characteristics (tensile strength, elongation, tear strength, softness and shrinkage temperature). Furthermore the test results were compared with two standard leather products, namely; standard 1 (SNI 06-0237-1989: standard for lining leather) and standard 2 (SNI 4593: 2011: standard for jacket leather). The use of all types of gambir and tanning formulations has produced skin that pass the standards of skin tensile strength, standard 1 (minimum 75 kg / cm2) and standard 2 (minimum 150 kg / cm2). The results of the skin elongation test showed that only the use of gambier A pass the standard 1 (maximum 25%) and only the use of gambier C with tanning formulations (Std + Aux) that did not pass standard 2 (maximum 60%). The results of the use of gambir A produced the highest tensile / elongation ratio, 12.16 kg / cm2for the tanning formulation (Std) and 10.42 kg/cm2for the formulation (Std + Aux). Skin tear strength was not required by standard 1 and all skins pass standard 2 (minimum 12.5 kg / cm). Skin softness was not required by standard 1 and all skins do not pass standard 2 standards (5.0-7.6 mm). The use of gambier B results the highest temperature shrinkage of skin, this was influenced by a high ratio t/nt (1.77) and low gum content (6.15%), the addition of auxiliaries (penetrator and sulphate oil) in the formulation tanning (Std + Aux) increases shrinkage temperature the skin from 760C to 780C.]]>
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