Strike up a colorful correspondence using dip-dyed papers. Different papers will take fabric dye differently (and coated papers may not take it at all), so results can be surprising. We also dipped a roll of rayon seam binding, resulting in wide stripes.
We used Rit liquid dyes in Scarlet, Denim, and Navy, and Rit powder dye in Gray. You can combine colors for custom shades. Let the dye solution cool before dipping paper.
Don't worry about creating precise lines when dipping in paint; irregularities are part of the appeal. If you still have paint left over after dipping, pour it back into its can to use for future projects.
Try our Dip-Dyed Pencils craft.