Charles Ellicott Commentary Exodus 35:25

"And all the women that were wise-hearted did spin with their hands, and brought that which they had spun, the blue, and the purple, the scarlet, and the fine linen." — Exodus 35:25 (ASV)

All the women that were wise-hearted — that is, “all who had sufficient skill.” Spinning was probably a very general accomplishment of the Hebrew women. It was accomplished in early times by means of a wheel and spindle, with or without a distaff. The only materials used for the fabrics of the sanctuary appear to have been flax and goats’ hair. The flax was dyed before it was spun into thread, as sometimes by the Greeks (Horn. Od. iv. 135).

Of fine linen. — Rather, of white. Most of the Egyptian linen is of a yellowish white, being made from flax imperfectly blanched.