Contrasting agents

[Monnoyer Philippe <monnoyer@imec.be>]

Hello Folks,

Is a contrasting agent in Pt/Pd processes (or even cyano) just working
as an oxidizer ? Meaning that it reduces the density evenly on the
print, and as the concentration is low, the reduction is low too. This
gives burned highlights. Isn't it more a reducer than a contrasting
agent ?
I would expect a contrasting agent to boost the high densities.

Does one of you have Pt/Pd DlogE curves and experiments to share about
it ?

Thnak you,

Cheers,

Philippe