What can be used to "stop" the bleaching action when discharging dye on fabric using a common bleach pen?

Question

I understand that putting the fabric into water will not do the trick!!!

Answer 1

Bleach Stop or AntiChlor from prochemical.com and dharmatrading.com are the best. vinegar water will work too, but not as well--also use ventilation with this as chemicals produced are not too great. there is also some pool chemical stuff that can work in a pinch.
professional textile artists use the first 2 options.

Answer 2

try a base of some sort... if bleach is acidic, that should do the trick... right? as to what kind of base, I'm not sure. Maybe baking soda?