How do you use them? Make a drawing and then wet the paper, draw on wet paper or wet the tip?
Well I'm going to use them to color in stamps. You have to use a permanent ink to stamp with or the stamp will bleed.
I have several water brushes (a paint bush that you fill with water). You squeeze it when you want a little more water. But you can also use a reqular paint brush and just add a little water. Once you let the first layer dry you can layer another color and blend. The first color won't reactivate.
I looked on youtube for someone reviewing them and found this:
[youtube=425,350]i9GZHPv0uNo[/youtube]