Setup for delivering images to Print Page

Hi,

I'm trying to achieve having a print page specific size and styling (greyscale) for some of the wysiwyg inline images in my latest project, so I thought this should be easy with a media query and picture. I read somewhere that picture does deliver images for both screen and print, but I can't figure it out. This is what I've tried:

• add new breakpoint to my wysiwyg-breakpoint group
• address that breakpoint to media {only print and (min-width: 0px)}
• I tried having the breakpoint both on bottom and on top of the breakpoint chain
• create new greyscale image style
• map the image style to the corresponding breakpoint

This sounds reasonable, but no greyscale image is printed. It's not even generated. Still, looking at the code I see that the picture-tag contains all styles. What else do I have to do?

Cheers,
upunkt