Re: Dryingtime before profiling matte paper
Re: Dryingtime before profiling matte paper
- Subject: Re: Dryingtime before profiling matte paper
- From: bruce fraser <email@hidden>
- Date: Sat, 15 Jan 2005 11:42:35 -0800
At 1:28 PM +0100 1/15/05, Ernst Dinkla wrote:
I have seen a Black density increase within 12 hours for the
Epson Archival pigment and the MIS7600 Eboni black pigment
inks on Hahnemuhle coatings. Are you sure that there's a drop
in Black density ? Pure Black samples measured though and the
effect may differ per coating.
I haven't really worked with either of these inks, but yes, I'm sure
I get a small drop in 4/c black density on UC inks/Epson Enhanced
Matte. It may not be entirely due to the black ink-my testing was
focussed on the narrow question of when the print reached stability.
I've asked this before: Are forced drying methods with warm
air delivering differences to the normal drying process = other
measurements ? One of the aspects could be a longer period of
bleeding into the coating in the normal drying process.
This is not something I've tested-I just don't know the answer.
Are differences of 0.3>0.4 delta-e per sample between multiple
target (row) readings normal ? That's 3x the instrument drift
of 0.1 delta-e but I guess the last is measured on fewer samples.
That would depend on the instrument. With the SpectroScan on a stable
target, I generally get differences of around 0.12 for the best 90%,
0.35 for the worst 10%, with one or two outliers as high as 1.0,
maybe a tiny bit better with the ICColor. I wouldn't worry about a
few patches coming in at 0.3-0.4, but they should be in the worst 10%.
Bruce
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