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This study examines the behaviour of three types of humic acids (natural humic acids, regenerated humic acids, and sulphited humic acids) with regard to their capacity to be used as tans and retans. The study makes use of conditions set out in a previous study (See Determination of penetration and
fixation curves of leather using humic derivatives). Additionally, subsequent complementary tests were carried out using other retans that are commonly used in the tanning industry in order to compare and
improve on the physical properties assessed here
CitationBacardit, A. [et al.]. Humic acid derivatives as tanning and retanning agents. "Journal of the Society of Leather Technologists and Chemists", 02 Abril 2012, vol. 96, núm. 2, p. 64-67.
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