Taruh pakaian dengan keping pengaman di lemari pembeku. Lepaskan keping pengaman.

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
Freeze the garment overnight for best results. You can just use your hands, pliers, or the rubber band method. This will ensure that the ink won't spill everywhere if you make a mistake -- ink can't spill if it's frozen.