Discussion:
Epson 1400 A3+ Chart
Todd Sailor
2014-01-30 23:27:16 UTC
Permalink
Hello, I am rather new to Argyll. I have searched for some concise information on creating a chart for my Epson 837 and have had success in profile creation.

However, I still need some help filling up an A3+ (13”x19”) sheet with patches. I have a ColorMunki and I understand 8mm is an acceptable minimum size. I would like to fill a page or two with patches at this size.

Could someone walk me through the targen string, or provide it?

Thanks much!
BC Rider
2014-01-30 23:59:56 UTC
Permalink
Post by Todd Sailor
However, I still need some help filling up an A3+ (13”x19”) sheet with patches. I have a ColorMunki and I understand 8mm is an acceptable minimum size. I would like to fill a page or two with patches at this size.
Could someone walk me through the targen string, or provide it?
What printtarg string are you using? The following will support 1748 patches assuming I have the A3+ size correct:

printtarg -v -iCM -h -a0.6 -t360 -p333x482 testname

Given that, targen just needs to produce a 1748 patch target:

targen -v -d2 -G -f1748 testname

Be sure to measure your printed target to check for unexpected scaling problems. Suggest scanning with a double-sided ruler (search archives for discussion of this) with 8.22mm patch size (measure 10 rows and divide by 10).
Todd Sailor
2014-01-31 03:21:29 UTC
Permalink
That seemed to have worked. I did tweak the -p value to 330x482.

It took a bit with Adobe Color Printer Utility, but scaling at 97% got it all on one page.

Thanks!
Post by BC Rider
Post by Todd Sailor
However, I still need some help filling up an A3+ (13”x19”) sheet with patches. I have a ColorMunki and I understand 8mm is an acceptable minimum size. I would like to fill a page or two with patches at this size.
Could someone walk me through the targen string, or provide it?
printtarg -v -iCM -h -a0.6 -t360 -p333x482 testname
targen -v -d2 -G -f1748 testname
Be sure to measure your printed target to check for unexpected scaling problems. Suggest scanning with a double-sided ruler (search archives for discussion of this) with 8.22mm patch size (measure 10 rows and divide by 10).
Ivan Tsyba
2014-01-31 11:03:10 UTC
Permalink
Default i1 8 mm patch size is not good for ColorMunki.
Use 8.26 mm row width: ColoMunki width is 41.3 mm, 41.3 / 5 = 8.26, so you
can read target with ruler

Just add to printarg "-a 1.0325" that scale i1 row to 8.26 mm
(8*1.0325=8.26).
Post by Todd Sailor
That seemed to have worked. I did tweak the -p value to 330x482.
It took a bit with Adobe Color Printer Utility, but scaling at 97% got it all on one page.
Thanks!
Post by BC Rider
However, I still need some help filling up an A3+ (13"x19") sheet with
patches. I have a ColorMunki and I understand 8mm is an acceptable minimum
size. I would like to fill a page or two with patches at this size.
Post by BC Rider
Could someone walk me through the targen string, or provide it?
What printtarg string are you using? The following will support 1748
printtarg -v -iCM -h -a0.6 -t360 -p333x482 testname
targen -v -d2 -G -f1748 testname
Be sure to measure your printed target to check for unexpected scaling
problems. Suggest scanning with a double-sided ruler (search archives for
discussion of this) with 8.22mm patch size (measure 10 rows and divide by
10).
Tomasz Danus
2014-02-01 10:28:44 UTC
Permalink
Ivan

Unfortunately not every CM is 41.3mm wide.
Mine is 42.0 - 2,5 years old purchased in UK
and it was discussed here that various CM has different width.
So your advice is perfectly fine if you replace 41.3 by X
and every one can make their own calculation based on
their own particular CM unit

Cheers
Tom
--
t.danus-***@public.gmane.org
Skype: Ithilstone
Post by Ivan Tsyba
Default i1 8 mm patch size is not good for ColorMunki.
Use 8.26 mm row width: ColoMunki width is 41.3 mm, 41.3 / 5 = 8.26, so
you can read target with ruler
Just add to printarg "-a 1.0325" that scale i1 row to 8.26 mm
(8*1.0325=8.26).
That seemed to have worked. I did tweak the -p value to 330x482.
Post by Todd Sailor
It took a bit with Adobe Color Printer Utility, but scaling at 97% got it
all on one page.
Thanks!
Post by BC Rider
However, I still need some help filling up an A3+ (13”x19”) sheet with
patches. I have a ColorMunki and I understand 8mm is an acceptable minimum
size. I would like to fill a page or two with patches at this size.
Post by BC Rider
Could someone walk me through the targen string, or provide it?
What printtarg string are you using? The following will support 1748
printtarg -v -iCM -h -a0.6 -t360 -p333x482 testname
targen -v -d2 -G -f1748 testname
Be sure to measure your printed target to check for unexpected scaling
problems. Suggest scanning with a double-sided ruler (search archives for
discussion of this) with 8.22mm patch size (measure 10 rows and divide by
10).
Ivan Tsyba
2014-02-01 10:40:49 UTC
Permalink
Tomazh, you're right.

So, precisely measure your Colormunki width in mm (calipers will help), and
you get CMW. Then calculate needed row width: RW=CMW/5. Then calculate
needed scale factor for printtarg: A=RW/8
And finally use this factor in printtarg: -a A
Post by Tomasz Danus
Ivan
Unfortunately not every CM is 41.3mm wide.
Mine is 42.0 - 2,5 years old purchased in UK
and it was discussed here that various CM has different width.
So your advice is perfectly fine if you replace 41.3 by X
and every one can make their own calculation based on
their own particular CM unit
Cheers
Tom
--
Skype: Ithilstone
Post by Ivan Tsyba
Default i1 8 mm patch size is not good for ColorMunki.
Use 8.26 mm row width: ColoMunki width is 41.3 mm, 41.3 / 5 = 8.26, so
you can read target with ruler
Just add to printarg "-a 1.0325" that scale i1 row to 8.26 mm
(8*1.0325=8.26).
That seemed to have worked. I did tweak the -p value to 330x482.
Post by Todd Sailor
It took a bit with Adobe Color Printer Utility, but scaling at 97% got
it all on one page.
Thanks!
Post by BC Rider
However, I still need some help filling up an A3+ (13"x19") sheet
with patches. I have a ColorMunki and I understand 8mm is an acceptable
minimum size. I would like to fill a page or two with patches at this size.
Post by BC Rider
Could someone walk me through the targen string, or provide it?
What printtarg string are you using? The following will support 1748
printtarg -v -iCM -h -a0.6 -t360 -p333x482 testname
targen -v -d2 -G -f1748 testname
Be sure to measure your printed target to check for unexpected scaling
problems. Suggest scanning with a double-sided ruler (search archives for
discussion of this) with 8.22mm patch size (measure 10 rows and divide by
10).
BC Rider
2014-02-01 17:42:40 UTC
Permalink
Date: Sat, 1 Feb 2014 12:40:49 +0200
Subject: [argyllcms] Re: Epson 1400 A3+ Chart
Then calculate needed scale factor for printtarg: A=RW/8
You are assuming the I1pro target is always used!

Personally, I think it is better to use the staggered CM
target as it is much more robust for row width errors
(especially when low -T ratio used in Chartread).

Uncertainty in row widths is another reason I recommend
using a double-sided ruler. Not only does it completely
constrain the Munki, but incorrect row widths become
instantly obvious when the ruler is laid down.

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