QTR-Quadtone RIP

Lightroom keeps all edits to an image in a sidecar file that Print Tool doesn't apparently see. Therefore, you need to export the file to one of the compatible PT formats before sending it to PrintTool.  Also, by default, Lightroom embed Prophoto colorspace to all files (color and B&W). So when you export the flattened file, you can choose to have it convert to another color space or keep it ProPhoto.

I read that QTR PrintTool converts all RGB files to Gray, and that the image in PT preview should look the same as it does in Lightroom preview, or very close. My problem is that it doesn't… PT image (on screen and printed) is noticeably darker. I've tried various fixes, but the only thing that seems to work is to edit the image in Photoshop, convert it to GrayGamma 2.2, then print it using PrintTool, using "No Color Management"

The other method that comes close is to use the file exported from Lightroom in ProPhoto space, open it in Print Tool, but to use "Application Managed" CM with the color space as "QTR-RGB-Matte" (the paper I'm using). Then once I hit "Print" and the QTR dialogue box opens, I set it to my curves setting. 

I'm still not sure what's going on as I'm following all the most recent instructions for Print Tool, but I don't want to open my B&W files in PS just to convert to GG2.2 in order for PrintTool to work.   Perhaps PT isn't the best solution for LR users…. don't know.  Anyone have any thoughts about this?

J. Riley Stewart