What was the most developed handicraft industry in the Roman Empire?

Wool spinning is the most developed handicraft industry in Roman Empire, and its technology is advanced enough to stand out in the world. Wool fabrics are called "wandering things" in China ancient books. Wei Lue records that there are "ten kinds of robes in Daqin, including yellow, white, black, green, purple, crimson, purple, gold, pale, yellow, five-color velvet and five-color and nine-color velvet". Another China ancient book introduces Egyptian blankets, which are woven with birds and animals, vegetation and clouds, and are very vivid; The woven parrot, unexpectedly, "looks like flying on the porch." Mattresses shipped from Egypt are very popular all over China.