1. To study the color of silk, natural dyes from lichens. Type lettuce shoots bubbles (Parmotrema Praesorediosum)
2. Durability to washing of silk, natural dyes from lichens. Type lettuce shoots bubbles (Parmotrema Praesorediosum)
3. Study the color of silk dyed with natural lichen. Type lettuce shoots bubbles (Parmotrema praesorediosum) used Mordant (Mordant) different.
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