To get deep color, color lightly, press, color lightly press, and keep repeating until you get the color you want. On a scrap piece you can try this, and try one where you color heavily and see which one you like better. I think you'll find you like the layered process better. It's also easier to blend color or get different values of the same color. I usually lay a heavy piece of cloth over my ironing board and then several layers of paper towel. CHANGE THE PAPER TOWEL often or it will transfer back onto your project.