Griffin Dyeworks & Fiber Arts

Understanding Mordants and Modifiers



Description: Mordant, while odorless crystalline powder; laboratory product
Other Names: Thiourea dioxide, SpectraliteTM, thiocarbamide, thiourea, thio-urea
Dye Use: Color stripper, indigo reducer, twice as strong as, and much safer than, sodium dithionite
Best On: Cotton, linen, hemp, ramie, etc. Use lightly on wool, silk and rinse well.
Dye Recipe: Use as directed in indigo vat recipes. Don't overheat or it can damage fiber.
Safety: Toxic chemical. Harmful if swallowed. Fumes can irritate. Keep away from heat sources. Don't reuse empty containers. California Proposition 65 Warning.
Disposal: Dilute considerably, pour down toilet or sink
Alternative: Sodium dithionite, lye, RITTM color remover
Source: Griffin Dyeworks

CODES: c = cup; gal = gallon; lb = pound (weight); tbsp = Tablespoon; tsp = teaspoon / [AF] Anglo-French; [Ar] Arabic; [AS] Anglo-Saxon; [Dan] Danish; [Du] Dutch; [Fr] French; [Ger] German; [Gk] Greek; [It] Italian; [L] Classical Latin; [LL] Late Latin; [ME] Middle English; [ML] Modern Latin; [OE] Old English; [OF] Old French; [ON] Old Norse; [OS] Old Saxon; [Port] Portuguese; [Sp] Spanish; [Sw] Swedish / CE = Common Era; BCE = Before Common Era

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