You can also use cold, leftover coffee. [1] X Research source
To bake your paper: set it down on a clean baking sheet, then bake it in a preheated oven at 200°F (94°C) for 5 to 10 minutes. To blow dry you paper: set it down on a waterproof tablecloth, then blow dry it. Flip it over onto a dry part of the tablecloth, then blow dry it some more. Blot any excess coffee with a paper towel.
If the coffee is too dark, don’t worry, you can always lighten it with more water. The coffee can be cold as well.
The paper will get wet, but don’t let it get too soggy. [8] X Research source
You can also lightly brush the paper with water. This will help soften any harsh lines.