Judy's suggestion to use dishwashing bleach gel is a good one. You can't use bleach with sodium alginate because the bleach will "eat" it right away. The bleach thickener is called monagum.
I couldn't bring up Dharama's page right now so I'll use ProChem. Here's Monagum:
http://www.prochemical.com/Glossary/Monogum.htmIf you are going to use bleach discharge, you must use a bleach neutralizer:
http://www.prochemical.com/Glossary/AntiChlor.htmRinse the bleach product off before soaking in bleach neutralizer.
You can also get bleach neutralizers at pet/fish stores.
I would mix bleach/dye/paint art stuff with a dedicated blender or whisk.
Here is a product to carve your own stamps (E-Z Cut):
http://www.dickblick.com/zz404/02/I've seen this kind of stuff at Michael's and art supply stores.
I use linoleum cutters to carve this and it is very easy.
If you have hard linoleum carving material, you can rough it up with sandpaper to print with.
k. taltre