"water works" dye?

I've read about one type of water mix dye, Bigen I think. It's something like when they're mixed with water it makes peroxide. Of course I can't find it now, can't remember for the life of me how I found it before, so could be wrong. Don't quote me until I'm sure!

Edit - Ok, I think I found it. The suspect ingredient is sodium perborate. http://en.m.wikipedia.org/wiki/Sodium_perborate

'Sodium perborate undergoes hydrolysis in contact with water, producing hydrogen peroxide and borate.'

'Uses

It serves as a source of active oxygen in many detergents, laundry detergents, cleaning products, and laundry bleaches.[1] It is also present in some tooth bleaching formulas. It is used as a bleaching agent for internal bleaching of a non vital root treated tooth. The sodium perborate is placed inside the tooth and left in place for an extended period of time to allow it to diffuse into the tooth and bleach stains from the inside out. It has antiseptic properties and can act as a disinfectant. It is also used as a "disappearing" preservative in some brands of eye drops.

Sodium perborate is a less aggressive bleach than sodium hypochlorite, causing less degradation to dyes and textiles. Borates also have some non-oxidative bleaching properties'

Here's the ingredients of one of the water works dyes.

Ingredients: Sodium Sulfate, Sodium Perborate, Sodium Silicate, 2-Amino 6-Chloro 4-Nitrophenol 4-Amino 2-Hydroxytoluene m-Aminophenol Sulfate, Silica, Xanthan Gum

So, while I'm still not 100% sure I'm right on this as I might be misunderstanding the chemistry (I see this a lot with claims of the bad things chemicals do to us, so I'm trying to be careful in what I deduce here), but I think its possible there's some tricksy marketing going on here. No, it doesn't come with peroxide in... But maybe, does it make peroxide when it mixes with water? It's probably milder if there's a claim to no lift, but I don't really trust them.