| Naphthol dyes include more hazardous
chemicals than fiber reactive dyes, which makes them less appropriate
for home use. Apparently, this type of dye is deemed too hazardous
to be sold by art and craft suppliers . The dyes are used by
craftspeople in Australia, Indonesia, and India, however. Use
only with extreme caution, in case of a possible risk of bladder
cancer or similar diseases.
The way naphthol dyes are used is fascinating. Two different types
of chemicals are mixed in the fiber, the diazo salt and the
naphthol; the specific combination determines the color obtained.
An advantage of this sort of dye is that contrasting colors
may be placed adjacent to each other on fabric without color
bleeding from one to the other. As with vat dyes, the final
color is provided by insoluble particles of dye that are stuck
within the fiber; only the components that react together to
form these compounds are themselves soluble in water. |
