1.Water based marker， no odor. The tip is not easy to dry, clear handwriting, suitable for paper, no trace on the back side 2.Permanent marker has a light sweet ink smell, not easy to fade and dissolve, Water based marker，no oder ，easy to wash off, smooth writing 3.Oil base marker:applicable on glass ，choice for industry 4.Water base marker:no oder，easy to be washed off，smooth writing applicable on paper