It takes very long to produce large volumes of bolt(s) of silk. It seams like the “timer” does not behave like other times in crafting cutting the crafting time in half everytime you procide an item. While other crafts does this maby 3-4 times and then you are at max speed, it seams like bolt(s) of silk only does it once.
This makes crafting talioring items in bulk take alot longer than say jeweler.