Re: laser printer testing in view of color
Re: laser printer testing in view of color
- Subject: Re: laser printer testing in view of color
- From: <email@hidden>
- Date: Mon, 09 Oct 2006 10:55:33 -0400
Hello Rebecca,
For short term measurements, I was thinking more of:
"just printed", and 5-10-30-60-180-360 min., and 12h, 24h.
For mid-term, this could be 1-2-3-7-14 days, and 1-2-4-6
months.
The short term is important when making profiles and
performing quality control. The long term is useful for
assuring/maintaining the quality of a proof over time.
Although the short term variations of laser printed colors
are likely smaller than for inkjets, the mid-term (weeks/
months) of the technology you are testing may not. I
suggest the following free (and HUGE, 80 MB) book on the
subject:
http://www.wilhelm-research.com/pdf/HW_Book_758_Pages_HiRes_v1a.pdf
from this site:
http://www.wilhelm-research.com
which, although a few years old, certainly applies to
print conservation analysis.
Danny
email@hidden
www.BabelColor.com
On Mon, 9 Oct 2006 09:07:15 +0800
email@hidden wrote:
Thanks Danny,
I'm very enlightened by your practice suggestion,
however, I'm not quite
sure about,
1. it seems to take a certain long time to wait before
printout starts to
change, should I measure the printout every day at a
certain time as well
as to record temperature, humidity?.
I'm a freshmen in this industry, there's a lot for me to
learn, your help
and patient is appreciated very much!
Cheers,
Rebecca
<dpascale@babelco
lor.com> To:
email@hidden,
email@hidden
cc:
email@hidden
2006-09-30 06:12 Subject:
Re: laser printer testing in view of color
Deer Rebecca,
How about:
Aging properties of printed material (change of color
with
time, light exposure (fading) and atmospheric
contaminants)
Uniformity from one printer to the other (for reliable
canned profiles).
Stability of color from day to day (i.e. susceptibility
of
printer/paper combination, when printing, to temperature
and humidity changes).
Stability of color from one toner batch to the other.
Stability of colors printed in low and high printing
loads
(one sheet-cold printer vs hundreds of sheets-hot
printer).
Surface effects from fused inks (bronzing, etc.)
Usability on both sides (surface finish, ink
penetration,
paper curl)
Not all of these are important all the time but I have
found that they pop-up regularly.
Regards,
Danny Pascale
email@hidden
www.BabelColor.com
On Tue, 19 Sep 2006 08:46:42 +0800
email@hidden wrote:
Dear all,
My company is planning to perform 50+ ppm laser printer
testing on various
of paper, is there any suggestion on color respect?
I'm planning to measure its gamut, solid density,
linearization and Delta
E, is there anything else?
Thanks for all your help.
Cheers,
Rebecca Peng
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