Abstract:
The commercial importance of
sulphur black dye is due to its ease of
manufacturing. Dye belongs to the group
of sulphur dyes. It is soluble in hot
aqueous solution of sodium sulphide
and the solution is having high degree
of properties than many other cotton
dyes available in the market. The main
drawback of this dye is poor fastness to
chlorine. The fastness of dye can be
increased by using melamine for
formaldehyde resin which forms
chloramines derivative with chlorine,
sulphur dye has a tendency to develop
sulphuric acid on storage. It is suggested
to use airtight vessel for strange and cool
dry condition is very essential. This dye
cannot be stored for a very long time
since deterioration is likely to occur.
