Introduce a new Pyro-developer, which contains Menthol as Phenol.
Pyro-developer has been used in long history as much long as conventional developer. Recently Sandy King produced a several type of recipe, named Pyrocat X (X is substituted some alphabet).
Pyrocat has some character, higher image resolution with finer silver grain, higher image acutance and so on.
In detail refer to the text authored by Sandy King;
http://www.pyrocat-hd.com/
Mintol named my new pyro-developer is based on the Sandy King's Pyrocat.
Pyrocat used Catechol as a Phenol which gives complex with separated metal silver. Catechol is rather special chemical hard to purchase in my country Japan, and expensive.
Mintol contains Menthol as Phenol. Menthol is popular chemical easy to obtain at aroma shop. I alternated "FRISK" as Menthol crystal. FRISK is a well known mint tablet available at convenience store, highly contains Menthol. So I named it as Mintol.
Below is recipe tentative as I tried.
Metol 0.1g
Ascorbic acid 0.3g
Sodium Carbonate (monohydrate) 3g
FRISK (trade name) 5tablets
to dissolve in 600ml water at 20degree(C).
This solution have no shelf life, so you should use immediately after dissolving.
Example posted above used Tri-X at EI(exposure index)=400.
Agitate condition; continuously initial 30s, and 5s in every minute.
Total developing time is 14minutes at 20C.
