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Author Topic: coverage of lab space  (Read 9909 times)
alanari
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« on: November 04, 2014, 06:08:07 PM »

Hello forum,
I'm trying to profile an old but still perfectly fit Epson SP2100, using a CISS system with pigment inks and various photo papers. I've been using both Adobe ACPU utility and a Qimage demo. My scanner is an Epson v700.
Results are acceptable, but my Lab space coverage almost never goes above 8-9%. The rest of the stats are very good, the only problem is in Lab coverage.
Strange enough, at least one of my tests gave me a result of 16% in Lab coverage, but unfortunately I forgot to write down what procedure or parameters I was using..
What are in your opinion the factors that may be influencing this less than optimal result, aside from ink and paper?

Thanks for your help! Smiley
Alessandro
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« Reply #1 on: November 05, 2014, 12:17:41 PM »

8-9% is typical for matte papers.  Glossy and luster papers (where the ink sits on the surface) are typically 12-16%.  Lab space is so large that those are reasonable numbers.  Other than the printer and paper, the only other factor would be the scanner.  What type of paper are you using and what scanner are you using to scan the targets?

Regards,
Mike
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alanari
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« Reply #2 on: November 05, 2014, 01:52:37 PM »

Hi Mike, thanks for your reply. My scanner is an Epson V700, it's a rather high-end photo scanner and shouldn't represent a problem, unless misconfigured. I've followed all the instructions about 48bit scanning and driver setup. There may be other scanner related issues?
I'm stucked on the 8-9% figure on both glossy and semimatt paper. Both the paper types are not from a well known brand name. I would say I've reached the peak performance from the ink-paper pairs, but something tells me that there's still something I've not considered yet. Moreover I'm fairly sure I saw a 16% coverage some time ago, while testing those same papers, but unfortunately I forgot to note the parameters I was using.

Thanks again for your help Smiley
Alessandro
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