IMPACT OF FUNGAL GROWTH ON COTTON FABRIC
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Date
1999-09-09
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UNIVERSITY OF AGRICULTURAL SCIENCES GKVK BANGALORE
Abstract
This study comprised of both survey and experimental procedure conducted
during 1997-98 in Dharwad. Self structured questionnaire was prepared to elicit
information regarding popular brand of blue and starch used for household
laundering by personal interview method. The sample comprised of fifty female
households. Pure (100%) white poplin material was selected for experimental study
and subjected for three finishes viz., desizing, blueing and starching. The control
and treated samples were tested for occurrence of various fungi at two levels of
relative humidity i.e. 65 per cent and 85 per cent The samples were inoculated with
6 days old four fungal cultures namely Aspergillus niger, Rhizopus stolonifer,
Chaetomium globosum and Helminthosporium sps. Inoculated samples were
incubated for 7 days in humidity chamber and assessed for the extent of fungal
growth, damage and change in physical parameters viz., cloth weight, cloth bursting
strength and cloth tensile strength. The results of survey revealed that Robin liquid
blue and Revive instant starch were popular for the household laundering.
Aspergillus and Pencillium were the commonly found fungi in all the fabric
samples. The visual inspection showed a remarkable decline in texture, lustre,
colour and hand and feel of inoculated sample. Among the four selected cultures Rhizopus stolonifer damaged the samples maximum and Chaetomium globosum
minimum. The starched samples inoculated with Rhizopus stolonifer at 65 per cent
RH showed higher damage followed by control, blued and desized Chaetomium
globosum inoculated on desized samples at 85 per cent RH showed least damage.
All physical characteristics viz., cloth weight, cloth bursting strength and cloth
tensile strength were adversely affected on inoculation of fungal cultures.
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