Ilford Pan f 120 in PMK Pyro

[bascom49]

This website : http://www.zwillingsprojekt.de/medien/pdf/PMK_Pyro.htm
suggests reducing solution B by 25% when developing Pan f 120.
Can anyone explain why ?
Thanks

 

[john_s]

Slow films tend to be contrasty. Perhaps less alkali would tame it somewhat.

 

[bascom49]

Slow films tend to be contrasty. Perhaps less alkali would tame it somewhat.

Thanks John