all CS6 files suddenly have color where should be transparent

[sasabombasa]

on CS6 on Mac OS 10.14.  opened a file i've printed many many timew without changing it--an image on transparent background.  image colors are accurate, but where it should be transparent--where i should see nothing--i see pale blue covering entire area.  tried with another file, same prob.  opened a brand new file and put a black dot in the corner.  now the transparent area is pale yellow. 

using epson p400.  did nozzle check and head cleaning.  all good.  what gives?

thank you!

Lisa

[NB, colourmanagement net]

@sasabombasa are you using the same icc profile when printing - AND media settings? Perhaps try printing a standard test image e.g. please go here and download the Adobe RGB testimage: https://www.colourmanagement.net/index.php/downloads_listing/

I hope this helps
neil barstow, colourmanagement net - adobe forum volunteer - co-author: 'getting colour right'
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[sasabombasa]

Thank you for responding. I did a little troubleshooting of my own. Attached is a screenshot of the message I got when moving an image, a layer, from one document to another. The color image, on the left, is the one I've been having problems with, where transparent shows up colored. The image on the right prints just fine. Both images were originally scanned on the same scanner with the same settings. And up until now my color images printed properly. I don't adjust the settings.

So after I demonstrated that the black-and-white image printed fine, I dragged the color image from the other document over to it and got the error message you see. I clicked okay and then printed the image in the second document and it printed properly, the transparency was transparent. I have gotten this paste profile mismatch many times and I just hit okay, I don't do anything, don't adjust anything, and the images print just fine weather in the old RGB working space or whatever I'm dragging it into. but suddenly, all my color images with transparency show pale blue in the transparent area. I can't imagine having to one by one open those documents and transfer them to new documents. I bet you have a better idea.

[D Fosse]

First of all, you should just disable that warning in color settings. It tells you nothing useful. There is no reason anything needs to match the working space. The embedded profile wil override the working space.

Generally, scanner profiles are all over the map. I'd strongly recommend that you convert to a standard color space immediately as you get the file out of the scanner.

Also check your rendering intents. Relative colorimetric will remap the white point in a profile conversion. Absolute colorimetric will not remap the white point. If the white points are different, you see a color where there should just be white.

[sasabombasa]

changing to relative colormetric did the trick.  thank you so much for that!  but it doesnt explain why i didnt have make that change before.  my documents used to print correctly with absolute colormetric.  so it's a mystery.  but at least now i have a workaround--whew!

thank you!

[D Fosse]

It's not a workaround, it's the solution. You should generally never use Absolute colorimetric.  It's for special purposes.

The standard rendering intent for photographic use is Relative colorimetric.  (or sometimes Perceptual). One of the main reasons is preciselt that it remaps the white point.

As long as white points are identical, you won't see this. But they're not always identical, and then you need to remap.