Two things to note: these prints aren't as perfect as a photo print would be, and they're printed on thin paper, rather than photo paper. (mysahomestyling.com)
Create little packets of baking soda: add about a tablespoon of baking soda to a square of toilet paper or a small piece of thin paper towel or tissue. (inspirationlaboratories.com)
However, for the tiles that need to have multiple edges or curves, making a template with thin paper is very helpful. (stylebyemilyhenderson.com)