Search found 546 matches

by Keith Tapscott.
Wed Jan 08, 2014 11:35 am
Forum: The Digitaltruth Forum
Topic: Finally had it with Pyro.
Replies: 22
Views: 40729

Re: Finally had it with Pyro.

Kenny I am a scientist not a photographer. I am a manufacturer not a experimenter. What scientific information would you like to know about your "brew?" I don't need the "brew" because I would rather look at a 1 liter mix and a 21 step wedge of the curve produced on a TriX or HP5 film when processe...
by Keith Tapscott.
Wed Jan 08, 2014 11:31 am
Forum: The Digitaltruth Forum
Topic: Finally had it with Pyro.
Replies: 22
Views: 40729

Re: Finally had it with Pyro.

Ilford's own developers are very good from the tried and trusted ID-11 (D-76), Microphen and their excellent DD-X. For optimum image resolution and quality if a small loss of film speed can be acepted, try Perceptol diluted 1+1. For further information, download the fact-sheets from Ilford's own web...
by Keith Tapscott.
Thu Jan 02, 2014 5:30 am
Forum: The Digitaltruth Forum
Topic: Which "Salt or Pot ash" to use
Replies: 14
Views: 26689

Re: Which "Salt or Pot ash" to use

Keith, I am impressed by Damon's work, for a person who has not been at this for very long. His use of technical pan and forma 200 with PMK, is good work. And even more so with his floral pictures. Lowell, thanks for the information on the preservatives. I was thinking of conducting tests with all ...
by Keith Tapscott.
Mon Dec 30, 2013 12:40 pm
Forum: The Digitaltruth Forum
Topic: Which "Salt or Pot ash" to use
Replies: 14
Views: 26689

Re: Which "Salt or Pot ash" to use

Hello There is a considerable difference between the two, Sodium or Potassium Meta bisulfite and Sodium sulfite. The first two are interchangeable with some adjustment for molecular weight difference and the "salt" is a preservative or oxygen scavenger. Lowell Huff Clayton Chemical Lowell, I have s...
by Keith Tapscott.
Mon Dec 30, 2013 5:15 am
Forum: The Digitaltruth Forum
Topic: Which "Salt or Pot ash" to use
Replies: 14
Views: 26689

Re: Which "Salt or Pot ash" to use

My friend Damon got me into testing Pyro when he sent me copies of his photos, and I told him that I would start testing with it. Here is a link to some of his photos using PMK http://www.flickr.com/photos/100055029@N07/with/10485475513/ Thank You KennyE What is it that you found about his prints t...
by Keith Tapscott.
Sun Dec 29, 2013 4:02 am
Forum: The Digitaltruth Forum
Topic: Which "Salt or Pot ash" to use
Replies: 14
Views: 26689

Re: Which "Salt or Pot ash" to use

Look up the formula for Pyrocat-P and decide from there.
What is it about Pyro developers that you think are worthwhile?
by Keith Tapscott.
Sat Dec 07, 2013 9:03 am
Forum: The Digitaltruth Forum
Topic: New Ilford Papers.
Replies: 2
Views: 6870

Re: New Ilford Papers.

I wonder if this was necessitated by Adox' successful mcp and mcc papers that were introduced some years ago. Jim I believe that the papers were designed the way they are due to customer feedback. MG-Classic FB is said to give richer blacks than the MG-IV FB that it replaces and responds more notic...
by Keith Tapscott.
Sat Dec 07, 2013 8:32 am
Forum: The Digitaltruth Forum
Topic: Remembering a Kodak Christmas
Replies: 13
Views: 25127

Re: Remembering a Kodak Christmas

Kodak aren't dead yet. I understand the nostalgia though.

Take a look at this site.

http://www.photomemorabilia.co.uk/index.html
by Keith Tapscott.
Wed Dec 04, 2013 11:52 am
Forum: The Digitaltruth Forum
Topic: New Ilford Papers.
Replies: 2
Views: 6870

New Ilford Papers.

Ilford have introduced two new B&W FB papers. I am looking forward to trying them even though I like MG-IV FB very much.

http://www.ilfordphoto.com/pressroom/article.asp?n=174
by Keith Tapscott.
Thu Nov 28, 2013 8:34 am
Forum: The Digitaltruth Forum
Topic: Rodinal, its true story and formula.
Replies: 35
Views: 83773

Re: Rodinal, its true story and formula.

Pyro and Pyrocat will not last long in a sodium sulfite and sodium carbonate solution. So I toss them out because they were dead. And if you use sodium hydroxides in them they will die even faster. KennyE Pyro is not stable when stored in alkaline conditions. Why would someone use sulphite or carbo...
by Keith Tapscott.
Sat Nov 02, 2013 10:55 am
Forum: The Digitaltruth Forum
Topic: Playing around with a Microdol- X Substitute
Replies: 24
Views: 48835

Re: Playing around with a Microdol- X Substitute

Keith Microdol-X was a general purpose go to fine grain developer that replaced DK-20 in that role. It can be used for roll and sheet film. Many photographers, started using it instead of DK-50 or DK-60, as their general purpose developer. I do not think that Microdol-X was considered a "super fine...
by Keith Tapscott.
Fri Nov 01, 2013 11:05 am
Forum: The Digitaltruth Forum
Topic: Playing around with a Microdol- X Substitute
Replies: 24
Views: 48835

Re: Playing around with a Microdol- X Substitute

People learned that by reducing development a little and using a slightly higher grade of paper (#3 instead of #2) finer grain is obtained. You don't need super-fine-grain developers. I always use D-76 normally. I have always considered Microdol types as special purpose rather the general use devel...
by Keith Tapscott.
Thu Oct 31, 2013 6:14 am
Forum: The Digitaltruth Forum
Topic: Playing around with a Microdol- X Substitute
Replies: 24
Views: 48835

Re: Playing around with a Microdol- X Substitute

Because of improvements in fast films, which have made them finer-grained, fine-grain formulas like Microdol-X have fallen out of fashion. Straight D-76 is hardly different in any case. With my technique, I am able to use high-acutance developers and achieve fine grain as well. Foma sell a variant ...
by Keith Tapscott.
Tue Oct 29, 2013 5:57 am
Forum: The Digitaltruth Forum
Topic: Playing around with a Microdol- X Substitute
Replies: 24
Views: 48835

Re: Playing around with a Microdol- X Substitute

Another simple substitute for Microdol-X fits neatly between D-23 and D-25 and is literally D-25 with the metabisulphite halved. In 750ml of warm water (Blood temperature) dissolve the following constituents in the order listed below. Metol 7.5 grams Sodium sulphite, anhydrous 100 grams Sodium metab...
by Keith Tapscott.
Tue Oct 29, 2013 5:47 am
Forum: The Digitaltruth Forum
Topic: Playing around with a Microdol- X Substitute
Replies: 24
Views: 48835

Re: Playing around with a Microdol- X Substitute

We have a small misdirection here or understanding as to what it is that I am trying to do, and what some people may assume. I use D23, as a reference, and even thou most people think that the formula is Kodak's, it actually belong to Bogish and Hauff, the two persons that discovered Metol in 1891,...