Re: dtp70 charts
Re: dtp70 charts
- Subject: Re: dtp70 charts
- From: Scott Martin <email@hidden>
- Date: Tue, 13 Oct 2009 19:51:57 -0500
On Oct 13, 2009, at 2:54 PM, Bret Hesler wrote:
You have to go into the package contents of the Colorport
application and
edit a file named 020.DTP70.xml. To be safe, copy the file somewhere
safe,
just in case you mess something up. In the .xml file, there are all
of the
minimums and maximums for patches. Leader and tail, and page sizes,
all in
millimeters.
Oh, that's helpful! I just tried this and it works great - thanks!
Looks like Derek's got his answer. Warning - XRite's defaults and
limitations are there for a reason. If you use smaller patches and
longer lengths you will certainly increase your measurement failure
rate.
I had to edit this to be able to read a DTP70 chart that was scaled
down a
bit. I don't recommend going much under 6mm. I read a chart at 5.5mm
with a
few patches misread.
It's also not well known that x.25mm and x.75mm patch size increments
should be avoided on the DTP70. Only x.0 and x.5 values should be
used.If you make the charts with x.25 and x.75mm increments and
measure them in Photoshop you'll see that they aren't accurate.
Naturally this causes measurement failure, but the DTP70 finds it hard
to detect. What happens is the 70 reads along the lines of the patches
at the right side of the target. You can make a profile from it but
the quality will be poor. XRite has admitted to having this problem
but hasn't addressed it yet.
Scott Martin
www.on-sight.com
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