Q36: Mordant that dulls all colours is: - Art Principles and Interior Enrichment - Resource Management and Consumer Science- ICAR JRF/SRF 2024 | Agrigyan

• Chemical Action of Mordants in Natural Dyeing:
• In natural textile dyeing, metallic salts (mordants) fix dyes onto fibers and modify hue intensity:
• Iron (Ferrous sulfate / Copperas): Known as the saddening agent; it reacts with tannins and natural dye chromophores to dull, darken, and sadden all colors, shifting yellows to olive green and reds to deep purple/black.
• Tin (Stannous chloride): Brilliant brightening mordant.
• Alum (Potassium aluminum sulfate): Clear, neutral mordant maintaining bright natural shades.
• Chrome (Potassium dichromate): Imparts rich warm tones.
• Conclusion: Iron (Option 1).

Correct option: (1) Iron