Archived posting to the Leica Users Group, 2003/04/04
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]>Martin Howard wrote: >> >> Christer Almqvist wrote: >> >> > try stand development when you use Rodinal 1+100 with HP5+. >> >> Don't you get serious problems with smoothness (or rather, lack of) of >> tonality in even-toned areas with this? Is the dilution enough to >> overcome the roughness you can otherwise get? >> >> M. >> >You're asking Christer, Martin but let me say Pyro might be smoother and >more "even toned" then Rodinal @ 1:100 but not by much! >Arnold Gassan says to do 4x5 negs for copy work in Rodinal 1:100 said to >produce the most "straight line" (by Gassan and dozens of other people >I've heard) results than any other developer dilution combination with >many films. I can only agree. Most developer film combinations give an overall straight line when you plot the densities, except that there is usually a little dip below the straight line for zonesx 2 and 3 and perhaps four. Not with Rodinal 1+100 and HP5+. There the line is straight as you can get it. > And perhaps more so than Pyro. >When you say "even toned" it sounds to me like you mean straight line on >the H&D curve. I think he meant that an even grey or white or black or anything inbetween area would be rendered with absolutely the same density on the negative (except for fall of in the corners due to the lens) without any trace of uneven development. I have 33 exposures of grey cards on three different HP5+ film all developed in Rodinal 1+100 a copuple of weeks apart. No uneven development in any case. I use Paterson tanks >The is no mottling with 1:100 people go way beyond that but lots and >lots of people think of Rodinal as 1:100 stuff even though it's not on >the box. >Tri X in Rodinal 1:100 is a classic combination used by many of the best >people for years and years. >Not at all prone to mottling. >I'd agitate it once a minute perhaps every other minute. > >Generally more dilution will make a negative easier to print because >there is more tonal compensation. And to me that means smooth and >straight line. But there will be a point when you've diluted too much or >agitated too little. > >Smooth daddy o! > >Mark Rabiner >Portland, Oregon USA >http://www.rabinergroup.com >-- >To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html - -- Christer Almqvist D 20255 Hamburg and / or F 50590 Regnéville sur Mer please look at my NEW b+w pictures at: http://www.almqvist.net/chris/dozen/ old pictures still at: http://www.almqvist.net/chris/new - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html