Influence of dyeing condition on cloth color by yellow dyes from mixed fungi grown in different culturing media

Abstract

In the present study, cloth was dyed with yellow dyes obtained from a mixture of Aspergillus and Paecilomyces fungi grown in three different media, three mordant techniques, six mordant types and four dyeing repetitions. By matching with the Royal Horticultural Society (RHS) color chart, the range of colors developed on the dyed cloth was measured. The results showed that medium-1 and medium-3 produced stronger dyed cloth colors than medium-2; and different mordant types and techniques each also produced more varied cloth colors from both media than did medium-2. Meta- and pre-mordant using different mordant types applied to the dyes from all of the media each produced more varied cloth colors than did post-mordant; while mordant technique using Cu+2 and Fe+2 in the same media each produced more varied cloth colors than did other mordant types. The optimum condition for the cloth dyeing by the dyes in medium-1 and medium-3 added with pre-mordant Cu+2 was 3 times, while with meta-mordant Cu+2 was 3 and 5 times respectively. The optimum condition for the cloth dyeing by the dyes in medium-1 and medium-3 added with pre-mordant Fe+2 each was 1 time, while with meta-mordant Fe+2 was 1 and 5 times, respectively.