RE: Van Dyke and Kallitype
I put Argyrotype in the same class with VDB. Untoned Argyrotypes are probably more permanent that VDBs. However, for maximum archival qualities there is no question but tht Argyrotypes should be toned like VDBs and kallitypes.
Visually untoned Argyrotypes look like untoned VDBs to me so they rate the same here. Also, like VDB there is very little, if any, contrast control.
Process wise Argyrotype is much more paper sensitive than VDB and kallitype. Many papers that work well with VDB and kallitype don't work well with Argyrotype, and many that do work well are quite expensive.
Hi Sandy et al, How would you rate the newcomer to the family, Argyrotype? David H