There is no technical threshold for tape slitting, just buy a slitting machine. Generally, tape factories will have their own slitting workshops.

Some people who are simply engaged in slitting buy semi-finished tapes from tape factories, then cut them and sell them under their own trademarks. Generally, you need to have your own sales channels, so you don’t have to worry about not being able to sell it, so that’s okay. But if you don’t have your own stable sales channels, it will be difficult to make money.