These cards were made using a fantastic techniue called braying.To try this yourself you will need a soft rubber brayer and some kaleidoscope ink. Mine in these cards is blue breeze.
How to: Take your brayer and roll it repeatedly onto the ink pad, then roll it onto your sheet of paper.
This looks amazing when combined with black outline stickers as in these cards.
Another way to use this technique is as a background, as in the following card.
Give it a try. x