Clayton like HC110 is designed to give the same working chartiricts as D76, balance between speed, grain and contrast. As I recall Clayton was used by the Navy for use on ships as it was low vapor and less toxic in close spaces. . I used 76+ for many years, the store I use to shop at had a contact with several school districts and I got the same price the schools paid. At the time I was shooting a lot of film, but F76+ will not last more than a few months once opened. Past 4 years I've used a 76 clone from Ultrafine and primarily CM 100, but at $48 a gallon I want to move on to less expensive option. To complicate matters I've also moved from Ultrafine 100 and 400 back to Foma 200 and 400. I bought some Formadon, LQR, thinking it was a standard developer, not so, a high contrast line developer, so long story rather than order LQN back to D76. But might if I shoot more 4X5 might get a bottle or 2 of Clayton. I had good luck with F76, their version of Tmax developer, rapid fix, and stop bath.