Search found 181 matches

by Digitaltruth
Fri May 30, 2008 12:44 pm
Forum: The Digitaltruth Forum
Topic: zone processing
Replies: 27
Views: 25212

These points of view are not necessarily unreconcilable. While from a technical perspective there is only one "correct" negative, the zone system offers the ability to exercise control of a negative through a combination of understanding the contrast of a scene and manipulating exposure and developm...
by Digitaltruth
Fri May 30, 2008 11:26 am
Forum: The Digitaltruth Forum
Topic: processing
Replies: 3
Views: 5044

Its definitely worth trying Farmer's Reducer, although you should be sure to use it in its subtractive form which is applicable to general fogging. Any Farmer's Reducer kit can be used as either a proportional or subtractive reducer depending on how you mix it, and instructions should be included. I...
by Digitaltruth
Fri May 30, 2008 4:59 am
Forum: The Digitaltruth Forum
Topic: processing
Replies: 3
Views: 5044

Its very hard to say what has happened, but it might be that your film was fogged during loading or development. The other possibility is that your film hasn't been fixed properly. If the film is fogged, you can try using Farmer's Reducer on the negatives, or if it hasn't been properly fixed, you ca...
by Digitaltruth
Mon Apr 28, 2008 4:25 am
Forum: The Digitaltruth Forum
Topic: Agfa 25
Replies: 20
Views: 22110

Hi Bill, There is full information about APX 25 in the Massive Dev Chart, but it is listed in the Unlisted Data section. Although there are some discontinued films which are shown in the main chart, once a film has been out of general circulation for a few years, I routinely remove it and place it i...
by Digitaltruth
Fri Apr 18, 2008 9:33 am
Forum: The Digitaltruth Forum
Topic: Kentmere Chemistry.
Replies: 4
Views: 5719

No, that isn't going to be the case. The Kentmere chemicals are made specifically for the North American market, and are simply an alternative to the Kodak products where availability and cost might be an issue in different US States. Ilford has its own full line of processing chemistry which will c...
by Digitaltruth
Fri Apr 18, 2008 4:02 am
Forum: The Digitaltruth Forum
Topic: Kentmere Chemistry.
Replies: 4
Views: 5719

The results should be identical. The Kentmere chemicals are designed to replicate the Kodak products, so any differences would be academic.
by Digitaltruth
Wed Mar 19, 2008 8:39 am
Forum: The Digitaltruth Forum
Topic: Agfa 25
Replies: 20
Views: 22110

APX 25 has been out of production for some time now, and I've had several people asking about alternatives. While its true that modern medium speed films offer great quality, there are still some slow speed films worth looking at for their different characteristics. Here is a brief analysis which is...
by Digitaltruth
Thu Nov 15, 2007 6:36 am
Forum: The Digitaltruth Forum
Topic: sodium carbonate
Replies: 18
Views: 21594

1lb of Sodium Carbonate Monohydrate = 0.855 lbs of Sodium Carbonate Anhydrous.

If you convert the quantity based on this figure, the formula should work identically.
by Digitaltruth
Fri Nov 09, 2007 9:12 am
Forum: The Digitaltruth Forum
Topic: Rollei Infrared 5 minute Presoak
Replies: 19
Views: 20880

Robert, I feel it is necessary to defend the reputation of this film because you have been suggesting that there is something wrong with it. In fact, you continue to suggest this by saying that you doubt you are the only one who has had or will have a problem. Unfortunately, this is a common problem...
by Digitaltruth
Fri Nov 09, 2007 4:33 am
Forum: The Digitaltruth Forum
Topic: Rollei Infrared 5 minute Presoak
Replies: 19
Views: 20880

I'd like to clarify this thread so that people understand that there is no problem with the film. It now seems as if the issue is related to sharpening in your scanner. I just want to assure all other users of the product that no similar scanning problems have been reported, and we have had many peo...
by Digitaltruth
Wed Nov 07, 2007 9:42 am
Forum: The Digitaltruth Forum
Topic: Rollei Infrared 5 minute Presoak
Replies: 19
Views: 20880

I have personally developed many rolls of film from the identical batch to the one we sell on the web site and there is no hint of a problem. Additionally, many other users have been supplied with film from this batch - we are talking about thousands of people - and no one has reported a problem. Of...
by Digitaltruth
Wed Nov 07, 2007 4:41 am
Forum: The Digitaltruth Forum
Topic: Rollei Infrared 5 minute Presoak
Replies: 19
Views: 20880

OK, now I understand. However, even if you are digitally removing the particles, what I have said previously about the particles still stands. I've not heard other reports of any problem, so the likelihood is that the problem is being introduced during processing and the particles are drying into th...
by Digitaltruth
Tue Nov 06, 2007 11:27 am
Forum: The Digitaltruth Forum
Topic: Rollei Infrared 5 minute Presoak
Replies: 19
Views: 20880

Robert, I understand what you are saying, however it is not possible that these are part of the emulsion. If you are able to clean the particles off, then how can they be part of the emulsion? If these particles were part of the emulsion, then when you clean them off you would see holes in the emuls...
by Digitaltruth
Tue Nov 06, 2007 10:44 am
Forum: The Digitaltruth Forum
Topic: Rollei Infrared 5 minute Presoak
Replies: 19
Views: 20880

Hi Robert, The fact that these are particles which you are cleaning from the film indicates that they are coming from an external source. If this was a problem with the emulsion, we would already know about, and no one has ever reported such an issue. Additionally, the manufacturing and quality cont...
by Digitaltruth
Tue Nov 06, 2007 6:13 am
Forum: The Digitaltruth Forum
Topic: Rollei Infrared 5 minute Presoak
Replies: 19
Views: 20880

Hi Robert, If the substance that is adhering to your films resembles black dirt, then it must be being introduced during processing. I'm not sure that the presoak will have any affect whatsoever in this regard. Can you actually see physical particles and wash them off the film? If this is the case, ...