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  #1  
Old 10th December 2010, 08:37 AM
sergiojaen sergiojaen is offline
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Default Foma 131 dry down

Hi pals.

I did my own tests with this paper yesterday and I am a bit surprised by the results.
I tried (Les McLean's method) dry down time compensations from 8% to 20% (in 2% steps) a no one was right compared with the wet strip.

It is possible for this paper to need a further compensation?
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Old 10th December 2010, 08:58 AM
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Originally Posted by sergiojaen View Post
Hi pals.

I did my own tests with this paper yesterday and I am a bit surprised by the results.
I tried (Les McLean's method) dry down time compensations from 8% to 20% (in 2% steps) a no one was right compared with the wet strip.

It is possible for this paper to need a further compensation?
Hi Sergiojaen, I must confess I'm surprised that the dry down of Fomatone 131 is greater than 20%. Which surface was you using - glossy/matt?
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Old 10th December 2010, 10:24 AM
sergiojaen sergiojaen is offline
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Hi Trevor. Glossy surface.
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Old 10th December 2010, 07:59 PM
sergiojaen sergiojaen is offline
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No way!!!!!!
It was my mistake. I am using a stop clock pro timer and I set the compensation in positive.
I set +09% when I had to set - 09%
I will make tests again.
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Old 10th December 2010, 08:11 PM
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No way!!!!!!
It was my mistake. I am using a stop clock pro timer and I set the compensation in positive.
I set +09% when I had to set - 09%
I will make tests again.
Easily done - now looking forward to your new test results
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Old 11th December 2010, 12:17 AM
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Les McLean Les McLean is offline
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Quote:
Originally Posted by sergiojaen View Post
Hi pals.

I did my own tests with this paper yesterday and I am a bit surprised by the results.
I tried (Les McLean's method) dry down time compensations from 8% to 20% (in 2% steps) a no one was right compared with the wet strip.

It is possible for this paper to need a further compensation?
My drydown test suggests making tests from 8% to 12% in 1% steps 2% steps as you stated. In 25 years of using this method I've never found a paper that dries down more than 11%.
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Old 12th December 2010, 01:02 PM
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Martin Aislabie Martin Aislabie is offline
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Following Les's procedure I use -12% for MGFB Matt

To be honest it that number is a bit of a compromise - the highlights would need less but the shadows really block up as the paper dries.

However, when you settle on a value of compensation, it is a terrific technique for managing dry-down

Incidentally, I too made the mistake of adding compensation when I first tried the exposure for the dry down test.

I hadn’t realised Richard had cunningly adding both positive as well as negative compensation factors.

The positive factor is required for some toning processes, apparently.

Martin
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Old 12th December 2010, 02:06 PM
Dave miller Dave miller is offline
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Snip!

To be honest it that number is a bit of a compromise - the highlights would need less but the shadows really block up as the paper dries.

Martin
Doesn't that suggest that a contrast adjustment factor is also required; a change to a slightly lower grade?
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Old 12th December 2010, 03:03 PM
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Originally Posted by Martin Aislabie View Post
I hadn’t realised Richard had cunningly adding both positive as well as negative compensation factors.

The positive factor is required for some toning processes, apparently.

Martin
Some people think of "wet-up" rather than dry down in which case they'd want to give test prints more exposure. I heard somewhere that some toning processes can reduce overall density requiring a positive compensation. So you have the option of positive or negative .
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Old 12th December 2010, 06:56 PM
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Doesn't that suggest that a contrast adjustment factor is also required; a change to a slightly lower grade?
Sometimes it does - up to as much as half a grade - it just depends on where the critical tones in the print fall.

I settled on -12% as it seemes to represent the mid tones best

I like the results I can get with MGFB Matt but it isn't the easiest paper to work with

Martin
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