The Ranger line of Alcohol inks are absolutely amazing and come in a mutitude of colors. You can ink on any surface and it will stay! I have inked metal, plastic, glass, acylic, paper, photo paper and so much more. The neat thing with this product is, if you don't like how it turned out use the blending soultion and change it. It is really simple inexpensive and the possibilities are truely endless.
Give'em a try I promise you will be hooked!