Don't know about Atomal. I remember David Kachel referred to something about speedwise bleaching (the Sterry method?) as the way to get a true decrease in speed i.e., without affecting contrast. If memory serves me right, he talked of a pottasium dichromate and acid bath being used as a bleach. Let me know if you are interested and I'll try to dig out the references. I guess an off the shelf approach would be to develop normally and use a cutting reducer like Farmer's. Cheers, DJ.(posted 8557 days ago)