How many silk worm cocoons are needed to make one spool of thread?

It typically takes about 2,500 to 3,000 silkworm cocoons to produce one pound of silk thread, which is equivalent to approximately one spool. The exact number can vary depending on the quality of the silk and the specific type of cocoon used. Each cocoon produces a single continuous strand of silk, which is then carefully unwound and processed into thread.