"Lucenta Manual of Silver Emulsions (How to Make Photographic Plates and Paper)" - written by Saul Bolanos - add it to your library.
There is always more to be learned.
Please email the author directly for availability at 'cafedesaul [ at ] gmail.com'. I am forwarding this information for him.
I have asked the author for a copy and he has sent it. It has a lot of information that bridges the gap between newcomer, artist and researcher. Please contact him directly. He has indicated other books are planned.