I did consider talking to the lab owners I'm friendly with, but the problem with living in New York is unless you live in a way-out neighborhood or are super-rich, you are unlikely to have the space for bulk chemicals. I am stuffed to the gills already....eventually got all my mixed b/w and color chems stashed away in two different cupboards but the Tetenal concentrates are still just sitting in their box in a corner of the room. Now that I've seen the size (and weight) of the Bleach III I bought off eBay, I know I can't get any more chems this size. Retail price is OK when size--small size--matters .