Datacolor User to User Support Group.

Hi,

I have a Epson R1800 and the test image is dark! Lots of patches  
almost look black.
I tested with Epson Premium Glossy.

This is the image when i try to profile my paper:

>Hi,
>
>I have a Epson R1800 and the test image is dark! Lots of patches
>almost look black.

It's supposed to be that way. When you print the test image with color
management turned off (as you're supposed to); it comes out dark, and
measures that way, exactly as you're seeing.

You haven't built a PROFILE yet.

When you build a profile from the measurements; and then USE that profile
when you print "real" images; it will compensate for the darkness of
the test print (as well as color shifts and other idiosyncracies of
the non-color-managed printer).

-- 
David Miller
Senior Software Developer, Digital Color Solutions
ColorVision

you're not doing anything wrong. this is just how the target prints 
out. the whole concept of profiling is to calibrate according to the 
limited potential of your printer. you will never get colors out of 
your printer that match the pure RGB of a monitor. it's all about 
finding the next best color match that your printer ink can produce. 
the target pushes the colors, then from the measurements the software 
adjusts the output via a completed profile. you have to proceed through 
the entire process and create a profile before you can see how a good 
profile can help you predict your output.

ghi

On 16-Jun-07, at 6:53 AM, Herwin Jan Steehouwer wrote:

> Hi,
>
>  I have a Epson R1800 and the test image is dark! Lots of patches
>  almost look black.
>  I tested with Epson Premium Glossy.
>
>
>

>Hi,
>
>Thanx for the quick answer!
>
>What about this question:
>?
>A1, B1 etc are measured Grey. Is this normal?
>
>On the paper they look realy black! How-come that they are measured grey, is this normal?
>

They will always "look" lighter (more gray) than the "pure" patches in the
split view; what really matters is what the L,a,b values of the measurements
are.

First of all: to "see" your measurements better, get out of the Split display,
using the popup in the lower right corner of the Target window, and switch
to Measured mode, instead. This way you'll see only the measured values in the
entire patch; less distracting and more useful than the Split mode.

Move the cursor to the different boxes, and read the values in the bottom
of the Target window. If you've calibrated the spectro; and measured correctly;
you should find that the darkest patch (smallest L value) is 1A, which is
perfect black.

Looking at your attachment, that doesn't appear to be the case; I can't
see L values for these, but using an on-screen digital meter, your 1A
measurement is lighter than 1C and 1D. So: you may not have measured those
patches correctly; maybe you overlapped the measurement tip onto the white
gaps between the patches; you might need to go back, check, and remeasure
these.

On Premium Glossy on the R1800, you should be getting very small L value for
black (around 5, maybe even a bit less). More than that isn't correctly; and
if you look at your actual target print, you should also SEE (visually) that
1A is darker (or at least, visibly as dark) as 1B through 1E. It shouldn't start
off lighter and then get darker (as your attachment looks) as you go across.

Also, make sure you've calibrated your SPECTRO correctly: on the white round
tile on the calibration base; not on the paper. (PFP 2.1 has a picture of the
spectro sitting on the calibration base to make sure this is clear).

If your L for the black patch is more than about 5; and if 1C and 1D are
actually darker (smaller L values than 1A); then something's not right in those
first couple of meausurements; either go back and remeasure them; or start
over and remeasure the entire target more carefully; using Measured mode the
entire time, so you can better see what's happening; pay attention to some of
the Lab values as you measure, those darker patches in particular; and make
sure that they're behaving correctly.


Best regards,



-- 
David Miller
Senior Software Developer, Digital Color Solutions
ColorVision

Herwin, could you verify something for me.  When I do the media settings check it does not seem to matter which media I chose, it always lays down the same