Abstract
Studies were carried out on the role of microorganisms in the decomposition of ancient vegetable tanned leather. The samples were neutralized or sterilized to study the changes in chemical composition of extracts after their long-term humidification. The extracted (soluble compoounds and tannins) leather powder inoculated with various microorganisms was analyzed after 8 months of microbial development. It was shown that neutralization of leather causes an abundant development of microorganisms accompanied by chemical changes and that autoclaving does not cause the accelerated chemical hydrolysis of leather. The most active organisms in the decay were Chaetomium globosum, Scopulariopsis brevicaulis and Streptomyces sp. 1. Heavy deterioration of old leather collagen fibres was proved by chemical and SEM analyses.
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