That's my thoughts as well. Thanks.

Thank you Maureen.

Love that bath tub pic.

Oh, that looks good. Is that our copy for the studio ;)

Maybe still photograph it at intervals though.

Yes, I'd posted it over on the UK collodion FB page. Mark Ostermans' suggestion. Makes sense, and then you can see the changes compared to areas unaffected by light.

This was suggested elsewhere. "The silver will gain in density. Put a sheet of tintype material over half the plate in a frame and place it in a window. You’ll see it change."

This plate is with Sara as it was her question. I suggested displaying it as any other photograph and record it daily, weekly, monthly for changes.