bleach and re expose b/w paper

I'm sure I read somewhere about bleach and re expose paper
(Note I do not mean bleach and re develop )
but I guess its a similar process

I would like to do first exposure then bleach away most of it and re expose a second negative to do a montage

I know I can do this before developing the paper but thats not the way I want to do it

Anybody heard of this technique

thanks

robin

I have heard of this before.

You must use a rehalogenizing bleach. It is basically Potassium Ferricyanide and Sodium or Potassium Bromide. It can be done 2 ways. One is prior to the fix so that you can re-expose the entire paper (gives uneven results), and one that is done after the fix which gives an image based on a combination of both images.

You can re-develop or you can just expose for long times to get a brown image.

So, it can be done, but has never become really popular due to the problems of unevenness but done right you can get some interesting combinations.

PE

thanks PE

so the same bleach I use for bleach and re develop
why did I not think of that

robin