It fakes it. When you print on white paper then anywhere there is no ink will appear white. But, when printing on transparent transfer paper, no ink will be applied where the white should be. You’ll be left with a missing portion of your image.
There is a process you can use to get white letters with white transfer paper (not transparent). What you need to do is add a stroke to your text and then cut out the letters with a razor blade. You should print the text separately from the rest of the design and apply it last.
I’d only attempt this for straight, horizontal text. I’d never be able to individually place text on an arc and get good results. And if you could, it’d take you forever.
For just a few pieces this might be worth it. Cutting out and aligning your text is not going to be easy.
The easiest solution is to modify your art or use another printing method. I have an article that covers all the common printing methods, here.
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