I use these markers for giving presentations--well I used them for one day but since I found out they bled through on the flip chart they have been sitting on a shelf waiting for an alternate use.
We used the products to make banners on Staples banner paper. The markers worked well. The ink does bleed through the paper so you need a secondary covering under the paper you are working on so that the ink does not go on to your work table space. Overall a good buy and quality