Search found 129 matches

by Lowell Huff
Mon Sep 25, 2006 10:53 am
Forum: The Digitaltruth Forum
Topic: is the ilford multigrade paper developer good with contrast?
Replies: 5
Views: 8638

Many print processors, both labs and photographers, tell us that they find that our Clayton P90 Print Developer is very good for art and landscape shots and our Clayton Ultra Cold Tone Print Developer is fantastic for head shots.
by Lowell Huff
Mon Jul 31, 2006 2:32 pm
Forum: The Digitaltruth Forum
Topic: White Specs in Emulsion
Replies: 22
Views: 23598

I have for years, told our customers that they did not need a stop bath if the were using our fixers because they are stop- fixes. I also have recommended for years, not using hardener.
by Lowell Huff
Mon Jul 24, 2006 4:23 pm
Forum: The Digitaltruth Forum
Topic: Mixing Chemistry, Using Percentage Solutions
Replies: 3
Views: 5529

"Its not that I believe scientists to be always correct; but non-scientists to be wrong."

Isaac Azinoff
by Lowell Huff
Tue Jul 18, 2006 3:14 pm
Forum: The Digitaltruth Forum
Topic: White Specs in Emulsion
Replies: 22
Views: 23598

How does it harm fixer? What is the chemical reaction that harms fixer?
by Lowell Huff
Tue Jul 18, 2006 12:13 pm
Forum: The Digitaltruth Forum
Topic: White Specs in Emulsion
Replies: 22
Views: 23598

Developer carry over does not cause fixer to deteriorate. The purpose of stop bath is to stop development. Modern fixing formulas are buffered against pH change. That being said, acid, neutral or alkaline pH of fixers has no scientificly measureable effect on fixing. It is thio sulfate the combines ...
by Lowell Huff
Tue Jul 18, 2006 11:43 am
Forum: The Digitaltruth Forum
Topic: White Specs in Emulsion
Replies: 22
Views: 23598

Acetic acid Stop Bath has no chemical reaction with developer that will result in white specs. Aluminum dropping out of fixer hardener because it is improperly mixed, results in white specs.
by Lowell Huff
Tue Jul 18, 2006 10:35 am
Forum: The Digitaltruth Forum
Topic: White Specs in Emulsion
Replies: 22
Views: 23598

Alkaline, neutral, or acid pH of fixer, other than processing time, maybe, and some personal preferences, there is no scientific data to support that one is better than the other. The biggest advantage of acid fixer is in machine processing. It is buffered against developer carry over and no stop ba...
by Lowell Huff
Mon Jul 17, 2006 10:40 am
Forum: The Digitaltruth Forum
Topic: White Specs in Emulsion
Replies: 22
Views: 23598

Kieth:
The "hard water" deposits you describe are another reason why we manufacturers have made our formulas with additional water sofeners. The ancient formulas that everyone seems to think are so fantastic, do not have the level of sophistication or advantages that the modern formulas have.
by Lowell Huff
Fri Jul 14, 2006 6:08 pm
Forum: The Digitaltruth Forum
Topic: White Specs in Emulsion
Replies: 22
Views: 23598

What is the chemical reaction that not using stop bath causes white specs?
by Lowell Huff
Mon Jul 10, 2006 3:22 pm
Forum: The Digitaltruth Forum
Topic: White Specs in Emulsion
Replies: 22
Views: 23598

If you are using a hardener, STOP. White spects usually is the aluminum dropping out of solution.
by Lowell Huff
Wed Jul 05, 2006 10:57 am
Forum: The Digitaltruth Forum
Topic: Clayton F-76
Replies: 3
Views: 6618

Clayton F-76plus Developer

I am disapointed in the poor performance of our F 76 Developer for you. With rare exception, we have many very satisfied users of our product. You did not identify which film you were using, but if it was Kodak 100 TMX film; the processing times are 50% longer than Tmax 100 as printed on the label. ...
by Lowell Huff
Wed Apr 05, 2006 10:21 am
Forum: The Digitaltruth Forum
Topic: Arista Films
Replies: 3
Views: 6648

Arista edu. (Hungary) is Forte Film, the ARISTA II is FOMA Film
by Lowell Huff
Thu Feb 16, 2006 5:37 pm
Forum: The Digitaltruth Forum
Topic: maximum sharpnes
Replies: 19
Views: 23674

Our Clayton F76plus Developer is a gamma 1 developer with very wide latitude and contrast control. If you would like a sample, contact me.
Lowlel Huff
askus@claytonchem.com
by Lowell Huff
Tue Dec 27, 2005 3:34 pm
Forum: The Digitaltruth Forum
Topic: Clayton Ultra Cold Tone Developer
Replies: 2
Views: 5398

The CLAYTON ULTRA COLD TONE DEVELOPER will process between 100 -150 8X10 sheets per liter of working strength developer depending on if it is fiber or RC.
by Lowell Huff
Mon Dec 12, 2005 11:25 am
Forum: The Digitaltruth Forum
Topic: Increasing Sharpness through Agitation
Replies: 20
Views: 29229

Why don't we use the chemicals, films and papers as the manufacturer recommends to use them? If you need better image quality, use a better developer. We have learned several things about the relationship between silver halide and how to make developers and fixers since the 1920s. It just so happens...