Ol’ Uncle Twee Cat’s Photo Esoterica, Pt. 3:
Are you making most of your photographs on Hammer Dry Photographic plates? Of course, it goes without saying that most of us are. What’s that you say? Hammer Dry Plates have been discontinued and out of production for nearly one hundred years? Oh. Huh. Well, I guess I’ve got to get out of the house a bit more often, now haven’t I? Well, regardless, here is this short booklet on making negatives from the Hammer Dry Plate company. There is lots of interesting information of development and other such things.
.pdf at the end of the post.
HammerDryPlateAShortTalkOnNegativeMaking