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Digital BW, The Print

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Re: How Many Shades of Gray - K7 vs K3?

2011-03-21 by Keith

Paul wrote;
> 
> (I'm now looking at a different issue.  The Eb-4 tests look totally different now than a week ago.  We're in a rain storm.  Does humidity make a huge difference in dmax and tone due to the coatings' inability to hold as much ink?  Sometimes I want to dust of the enlarger...)
> 
> Paul
> www.PaulRoark.com
>


I do Cyanotypes on Arche HP and find that the drier the paper the higher the Dmax. Presumably drier paper sucks in more sensitiser, also the contrast to the eye seems higher.

However with an inket only firing a set amount of ink, you would need to up the amount of ink. This would present the problem of knowing the humidity of the paper at print time.

Just my two penny-worth.

Keith

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