Yep I know. These are the ones the company buys. I’ve tried others when I had to buy a box while out and about but n a hardware store or even a supermarket. Latex gets destroyed very fast, I didn’t notice much of a difference with vinyl… but you are right I have to try if some other material goes better. The thing is I don’t have a clue what the fuck they put in the inks and nobody seems to be able to tell me.