It shouldn't be like you said. I also print PVC materials. Of course it's not pad printing, it's screen printing. It's lenses. I used PS model oil and didn't drop it. You can also try to use 7 18 screen washing water to open the oil. If it dries faster, you can add oil and water. As you said, we will polish the oil. If it doesn't work, you have to change the oil. You can ask them to check the material samples when you send them to the oil factory.
You can add me QQ499785607, or you can go to the silk screen forum and ask the website. Add me QQ, and you know what I say.