Search found 172 matches

by Digitaltruth
Fri Nov 09, 2007 4:33 am
Forum: The Digitaltruth Forum
Topic: Rollei Infrared 5 minute Presoak
Replies: 19
Views: 21687

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: 21687

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: 21687

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: 21687

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: 21687

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: 21687

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, ...
by Digitaltruth
Thu Oct 04, 2007 11:29 am
Forum: The Digitaltruth Forum
Topic: Rollei IR Film
Replies: 3
Views: 5603

Maco IR820c Precision Infrared is now sold as Ekfe IR820. The "Aura" version of Maco IR820c is no longer available. Rollei IR400 Infrared is a completely different film and has much finer grain. It can also work as a standard 400 ISO film with grain and tonality rivaling Tri-X. Both films are capabl...
by Digitaltruth
Tue Sep 11, 2007 5:58 pm
Forum: The Digitaltruth Forum
Topic: Agfa Films and Developers Back?
Replies: 2
Views: 4688

When AgfaPhoto ceased manufacturing in 2005, the chemical production was taken over by A&O in Germany and provides identical products under the Agfa label, allowing for continuous supply. The fact that many dealers in North America stopped importing these products is nothing to due with supply, as t...
by Digitaltruth
Wed Jul 11, 2007 8:58 am
Forum: The Digitaltruth Forum
Topic: arista film developer
Replies: 13
Views: 14394

Hi Gary, There are different washing techniques recommended by different manufacturers and experts, so you need to reach your own conclusion. In order to account for local variables, the techniques we publish for Silvergrain Clearfix Alkaline actually exceed the times required to eliminate the resid...
by Digitaltruth
Tue Jul 10, 2007 4:56 am
Forum: The Digitaltruth Forum
Topic: arista film developer
Replies: 13
Views: 14394

All modern rapid fixers are based on ammonium thiosulfate. Sodium thiosulfate was used in the past as the primary agent in fixers, but is much slower. Pretty much every major fixer currently available uses ammonium thiosulfate, but this has no relation to alkalinity or acidity. For more information ...
by Digitaltruth
Sun Jul 08, 2007 11:13 pm
Forum: The Digitaltruth Forum
Topic: arista film developer
Replies: 13
Views: 14394

Hi Gary, Perhaps Lowell will correct me, but I don't believe that AFC is an alkaline fixer. The other alkaline fixer we sell is TF-4, but this requires a water rinse before immersion in the stop bath. The buffering system used in Clearfix Alkaline is not duplicated in any other product, and there is...
by Digitaltruth
Sun May 27, 2007 5:52 pm
Forum: The Digitaltruth Forum
Topic: ultrafine 125iso film.
Replies: 1
Views: 3458

Although I don't know what the source is, I would treat it like Ilford FP4+. Its almost certainly rebranded.

For general guidelines on reciprocity see this page:
http://www.digitaltruth.com/techdata/reciprocity.php
by Digitaltruth
Sun May 20, 2007 6:54 pm
Forum: The Digitaltruth Forum
Topic: Xrays and efke Backing Paper Data
Replies: 2
Views: 4832

Hi Greg,

I will contact the distributor and manufacturer and will report back on this forum once I have further information.
by Digitaltruth
Thu May 10, 2007 4:13 am
Forum: The Digitaltruth Forum
Topic: Old formulae
Replies: 35
Views: 34691

Hi Greg, Almost all developers and most other photo chemicals can be shipped by air, and we ship Silvergrain chemistry worldwide. The main difficulty in air shipment is that it requires someone to physically take the package to the post office, whereas most mail order is done by UPS/FedEx and is col...
by Digitaltruth
Wed May 09, 2007 6:57 pm
Forum: The Digitaltruth Forum
Topic: Old formulae
Replies: 35
Views: 34691

Rodinal is classified as hazmat because it contains potassium hydroxide (or sodium hydroxide in the original version), which is caustic. The hazmat restriction only applies to certain quantities, which is why you can buy a single bottle (from anyone who knows the regulations) and have it ground ship...