Wash new cotton thoroughly to remove sizing, rinse wool gently to preserve structure, and pre-wet silk before any heated step. Maintain consistent temperatures, avoid shocking protein fibers, and consider a second, lighter wash if water clouds quickly. Meticulous scouring may feel unglamorous, yet it unlocks depth, clarity, and evenness that dye alone can never rescue.
Wool and silk generally accept alum mordants beautifully, revealing rich glow and softness. Heat low and steady to avoid felting or fiber collapse, and allow slow cool-downs for improved penetration. Protein fibers absorb color quickly, so monitor closely, stir gently, and test a strand periodically. Patience here rewards you with nuanced, resilient saturation that endures.
Plant-based fibers often require extra steps to anchor color, such as tannin pre-treatments followed by alum. Soy milk methods can add grip, while careful pH adjustments fine-tune shade. Expect multiple soaks, extended rinsing, and a focus on uniform wetting. The investment pays off as formerly stubborn cloth begins to hold delicate hues with surprising commitment.
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