I have been asked many times what I use for the names I put in the retainers.
First, off the reason I do this is because it is state law here in Texas that some form of ID needs to poe placed in any removable device that has enough acrylic to accomplish this.
Second I use a Brother P-touch labeler, specifically, a PT-2430PC this is one that you connect to the computer. I gives you a word-processor-like software that lets you choose the font type, size, bold, etc. It also lets you print out clip art as long as it is black and white.
Third, the tape I use is TZ tape found at any office supply store (along with the printer) I use black print on clear tape. The clear part just blends in with the retainer acrylic. They have different colors of TZ tape to choose from, Like black on white tape, or red on white tape. I used to use black print on white tape for labeling my study models, now I just use the same Black on clear tape I use for retainer names.