[rollei_list] Re: Plus X with Perceptol
- From: CarlosMFreaza <cmfreaza@xxxxxxxxx>
- To: rollei_list@xxxxxxxxxxxxx
- Date: Sat, 20 Feb 2010 18:24:45 -0300
I did not write Rodinal is one of the highest acutance developers, I
wrote it is a high acutance developer and even higher in comparison
with Microdol X/Perceptol, it is a high acutance developer even at
minimal working solution, 1+25, Rodinal has not solvents in ithe
formula.
The Rodinal panflet in the box says for the 1+25 and 1+50 dilutions:
"Rodinal is characterised by very good contour sharpness (acutance)
and high emulsion speed yield".
Wikipedia:
"A well-known property of Rodinal is its high acutance, due to the
fact that the Rodinal formula contains no silver solvent. Consequently
the metallic silver in film, once developed, is left in its natural
state, and does not undergo any "softening" by means of a solvent."
http://en.wikipedia.org/wiki/Rodinal
And this is an interesting article on Rodinal:
http://unblinkingeye.com/Articles/Rodinal/rodinal.html
Carlos
2010/2/20 Mark Rabiner <mark@xxxxxxxxxxxxxxxx>:
> Rodinal is not in the category of the highest acutance developers.
> Its a full category down. The sharp grain and high edge effects one gets
> makes people think they are getting the highest sharpness from their negs.
> Beutlers is in that top category.
> Check The Steve Anchell Bill Troop Film Developing Cookbook for the category
> breakdown.
> Solvent developers are way down the list but at very high dilutions can
> creep to the middle.
> That's most developers you keep in a bottle after mixing up from powder.
> They tend to have around 100 grams of sulfite in them.
>
> [Rabs]
> Mark William Rabiner
>
>
>
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