From the manufacturer:
These acrylic markers feature stunning paint-like ink that glides across the page with the control of a marker. The water-based ink won't bleed through paper, so your work stays clean. The bright color markers create vibrant marks on light and dark surfaces and boldly mark on paper, metal, wood, ceramic, glass, rock, and canvas. The colors beautifully layer to add dimension to your work. What's more, there's no need to prime these brush tip markers'simply uncap and go!