Ron ,

May be answer is hidden in the depths of Alternative Photography. But I want to ask , is there any chemical invention from Kodak , Agfa or any other , which chemical is available at the market for making non silver based cheaper faraway cheaper emulsions ?

I heard american companies are famous to dig deep inventors. Is there any whisper or patent , you saw , heard and share with us ?

Thank you ,

Mustafa Umut Sarac