Opportunity is missed by most people because it is dressed in overalls and looks like work. - Thomas Edison
The use of bleach as either an emergency substitute, or cheapskate home remedy used to come up frequently on the old TSPMB (and I bet it still pops up on TSF nowadays!)My first few years did not involve the use of direct emulsions, but rather indirect films, both knife cut and photographic like today's (though with carbon arcs, of course)I do remember the shift away from silk to polyester and nylon because of the bleach or emulsion remover's harshness.
Now I'm curious if there are suppliers shipping it standard--I know the stuff from performance does, and the ICC rep gave me some samples last month and mentioned they come hazmat as well, perhaps some suppliers are not?Back when I used ER-80, it was 20% or so periodic acid, and it was the strongest stuff I could get without weird shipping... but it could have been because of local delivery.