Acutance: Pyro & rotary vs intermittent and normal dev

Tom Stanworth

Member
Joined
Sep 4, 2003
Messages
2,021
Format
Multi Format
I would be curious to know if anyone has compared acutance with:

Rotary processing (or continuous agitation with, say, a paterson orbital) when using pyro type devs.

VS.

Regular tray or small tank development using normal intermittent agitation and a conventional developer, such as Xtol, D76 etc.

Does rotary and pyro (say Pyrocat HD) still trump the intermittently agitated regular dev combo?
 

MVNelson

Member
Joined
Sep 11, 2006
Messages
5,345
Location
North Florid
Format
4x5 Format
I don't know the answer to that but can tell you that negatives in say dilute pyrocat /prescysol with minimal agitation would be had to beat..
 
OP
OP

Tom Stanworth

Member
Joined
Sep 4, 2003
Messages
2,021
Format
Multi Format
MVnelson,

Sure. However, this is not a question about max acutance only whether one gets more acurtance from pyro devs rotary processed or a normal dev using intermmitent agitation. I am not a fan of the minimal agitation technique for my work and have the choice of continuing rotary agitation for 10x8 in which I can do ONE neg at a time or adopting trays and doing,say 6 at a time. This makes even more sense if I am not really getting any acutance advantage by using pyro by virtue of rotary processing. I think I will have to test this myself.
 

fhovie

Member
Joined
Mar 20, 2003
Messages
1,250
Location
Powell Wyoming
Format
Large Format
That is why I quit using rotary and have been using semi stand for much of my work in the last 4 years. Example - Tri-x using normal agitation or rotary has crisp grain but no enhanced chemical sharpening. At 30 minutes of semi stand processing an increase of accutance can be seen - both as an increase in sharpness and up close (10X loupe) a slight beginning of Mackie lines. At 60 minutes, the Mackie lines are distracting and no longer an improvement. If you prefer the look of snappy sharp - enhanced above what the lens did for you - do not mechanically erode your edges. These processes are of course dependent of the chemistry you use. Straight PC-TEA will not give you Mackie lines - I use pyrocat at 1:1:150.
 
Cookies are required to use this site. You must accept them to continue using the site. Learn more…