I guess its about embedded cmyk images. Can be inspected with
$ pdfimages /tmp/previewZTSTVZ.pdf -list page num type width height color comp bpc enc interp object ID x-ppi y-ppi size ratio -------------------------------------------------------------------------------------------- 1 0 image 818 750 cmyk 4 8 jpeg no 7 0 155 155 183K 7.6%
A "process workaround" is to open the images in libreoffice draw and print them from there, but obviously the underlying library should be fixed.
I guess its about embedded cmyk images. Can be inspected with
$ pdfimages /tmp/previewZTS TVZ.pdf -list ------- ------- ------- ------- ------- ------- ------- ------- ------- ------- ------- ------- -
page num type width height color comp bpc enc interp object ID x-ppi y-ppi size ratio
-------
1 0 image 818 750 cmyk 4 8 jpeg no 7 0 155 155 183K 7.6%
A "process workaround" is to open the images in libreoffice draw and print them from there, but obviously the underlying library should be fixed.