hi:
I learn form my technician who deying the f/w pearl in our factory.
he said no minimum quantity of deying a batch of fwp.
he once had a experence to dyed 3 strands of pearl loose.
but this have a little hard to control the colors.
dyed different colors need different time .like dyed gold fw pearl need about 5 days ,but dyed black,or chocolate pearls maybe need half of months.
