I've recently read that salted isopropyl alcohol can be used as a hardening bath for albumen printing when one wants to double-coat the albumen. Apparently the second coat will dissolve the first if the first layer is not hardened beforehand. Is this correct? Or does drying the albumen harden it enough? Is drying under low heat in a dry mount press an equally acceptable way to harden the albumen?
What might I expect to be different when sensitizing/printing/processing a hardened vs unhardened albumen print? Increased gloss or ???
The salting formula I'm using is:
1% sodium chloride
1.3% ammonium chloride
2.2% sodium citrate
The sensitizer is 20% silver nitrate brought to pH2 with glacial acetic acid.
Thanks for any insight.