Archived posting to the Leica Users Group, 2001/09/24
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Possibly Adam was thinking in terms that the longer the wet time, the greater the 'clumping' of the grains which might give an apparently larger grain size-- However, I have not heard of the clumping being an issue in years, possibly because of the advances in emulsions. Years ago, a slight change in processing temerature, even by a few degrees, could cause the dreaded reticulation. Well, I have at times by mistake found that I was washing film in HOT water, and have yet to get reticulation with the modern emulsions. They are 'harder' perhaps? If so, I don't think extended wet times would have any effect on the grain. The Delta films use what the Kodak people called "T-grain" which also seems to keep the grains in place and of a rather smaller and consistant size while maintaining a greater sensitivity than the older amorphous grained film. Just a thought. Dan - ----- Original Message ----- From: "Mark Rabiner" <mark@rabiner.cncoffice.com> To: <leica-users@mejac.palo-alto.ca.us> Sent: Monday, September 24, 2001 4:07 PM Subject: Re: [Leica] Diluting developer: was: Ilford delta 100 dev. suggestions > Adam Bridge wrote: > > > > Could those of you who do a lot of darkroom work talk to me about this > > dilute developer thing? I was sort of under the impression that longer > > developer times resulted in a general increase in the size of film grain. > > Generally I'm looking to push grain size down as much as possible. > ><Snip> > > I've never heard this nor has it been my experience. > Longer development times just tend to mean more compensated, even, easier to > print negs. > But dilution more Will tend to give you sharper grain more defined as you are > using less of a dilution of Sodium Sulfite > even thought you are using that dilution for a longer time. > Sharp grain had gotten to be more desirable with more people in the past 10 or > 20 years than a mush grain. > And mush grain usually means a non high resolution developer. > > > Mark Rabiner > > Portland, Oregon > USA > > http://www.rabiner.cncoffice.com/ > -- > To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html