Question

1. what is the term for something that attaches dye molecules to textile fibers?

answer) a mordant is the substance

1. what drawback comes from using iron instead of alum?

answer)

1. why do you think we had to process the substance so much?

answer)

Explanation:

1. For question 2: Iron mordants react with dyes and fibers to create dull, dark, often gray or blackish hues, unlike alum which produces bright, clear colors, and it can also make fibers brittle over time.
2. For question 3: Processing the substance (mordant) removes impurities, concentrates active components, and ensures it can evenly bind with dye and fibers for consistent, effective coloring.

Answer:

1. A mordant is the substance
2. Iron produces dull, dark colors and can weaken fibers.
3. To remove impurities, concentrate active components, and ensure consistent, effective dye binding.