SF Dyes manufactures Modified Liquid Vat Dyes. SF Dyes offers eco-friendly multi-purpose dyes and chemical dyes. The Modified Liquid Vat Dyes or Ecovat dyes contains carefully controlled amounts of reducing agent in order to obtain best stability in storage and colour yield in use. Since these dyes are pre-reduced, they have substanivity for cellulose and are therefore ready for dyeing, although an addition of extra reducing agent maybe required. After application to the fibre, the dyestuff is converted back into the water insoluble form by oxidation, similar to vat dyes, which results in dyeing with good fastness to wet treatments.