AFAIK, albumen is a poorer peptizing agent than gelatin is, so when you add the silver nitrate to the salt/albumen solution it will probably not form the most desirable crystals. It will probably fall out of the solution as a true precipitate. But if you want to add silver to the salt in a binder, why not just make a regular emulsion?

In any event, the thiosulfate step can take from 30 - 90 minutes at up to 70 degrees C, and this is impractical with a dry plate. It is usually done in a 'cooker' or a covered container to prevent ambient light fog and evaporation.

I'm not sure what the D76 and other chemistry would do to the albumen, but I suspect that in standard solutions it would wash off. The gallic acid would have a tendancy to harden the albumen.

PE