I'm going to start experimenting with dry albumen glass plate negatives in a large format pinhole camera. Due to the slow nature of albumen negatives I thought about using a small amount of sodium thiosulphate as a super sensitizer as this is used in many commercial gelatin films. My question is: why do all albumen formulas call for sensitizing the albumen after coating on the glass? Why can't the silver nitrate be added directly to the emulsion and then coated as in gelatin? Does anyone know of a technical reason why this won't work? And, as a side question: can albumen negatives be developed and fixed with modern methods? D-76 is a lot easier to get and work with than gallic acid... Doh!