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Ben Wilbur |
11:04 15 Feb 07 |
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Miles |
18:14 15 Feb 07 |
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Barry Wilkinson |
11:57 9 Feb 07 |
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Ben Wilbur |
6:19 10 Feb 07 |
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Steve Nicholls |
16:25 10 Feb 07 |
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Miles |
13:54 11 Feb 07 |
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Barry Wilkinson |
4:47 12 Feb 07 |
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Philippe dB |
1:27 31 Jan 07 |
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Jorge Gasteazoro. |
10:13 31 Jan 07 |
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Re: Paper Testing - which grade ? |
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Philippe du Busquiel |
1:38 2 Feb 07 |
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Hello Jorge,
Thanks for your answer.
I would like to test your idea but I wonder if I have the right conditions to get a grade 3 and beyond.
I have draw my curves for some grades. For the grade 2 (following Ilford filtering specifications for print with a color head on a variable contrast paper) I get a ES of 1.46. For the grade 4, the ES is about 1.16.
If I compare those values with the ES-grade conversion chart in Phil Davis book those ES correspond to a range of grade 0 to grade 1.
Is it correct to say that for grade 0 the ES should be about 1.5, for grade 1 ES 1.2, grade 2 ES 1.1, grade 3 ES 0.9, grade 4 ES 0.7 and for grade 5 ES 0.6 ?
If so, it seems that I am far below the ISO range values.
I use a dichroic color head on a Durst L1200 to print on variable contrast paper. The paper for testing was not quite new (2-3 years old)but I don't think this explains such a difference. Visually the test strips seem ok.
Maybe I should do a new test ...
Thanks for any suggestion you might have.
Philippe
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