Best printing quality in Gimp

I’m obviously missing something, but don’t know what. I need to be able to set best printing quality in producing digital negatives for contact printing using alternative photographic processes. I use Pictorico transparency film and an Epson Styles Photo T50 printer. I need to use an app like Gimp so that I can apply a correction curve that takes account of the characteristics of the process and materials used. The problem is that when I print the sheet feeds out in inch bites that leaves poor quality and horizontal lines between bites. I can solve the problem by exporting the adjusted image and printing it in another program like Pixelmator, which allows fine print settings. What am I missing? Many thanks.

Have you tried Gutenprint?
Turboprint is excellent, but there is a charge

Thanks Alex. I’ve installed Gutenprint, but how does it talk to Gimp? I’m useless when it comes to this sort of thing. I’ve searched the web for a simple explanation, but nothing makes sense to me. I’m still left with the old printing interface which won’t do the job for me.

Barry

Hi Barry,
I’m don’t have much printing knowledge but maybe this might help.
I actually use Glimpse (on windows) at the moment, which is very closely related to GIMP, so I assume the printing layout is the same, but not 100% sure.
When I go to ‘Print…’ in the ‘File’ menu, I get this little dialogue:

If I then click on ‘preferences’ my printer settings come up, like so:


and I can set all the printer settings. Obviously my printer is different from yours, my system probably is too, but you never know it might help :grinning:
Good luck!

Installed Gutenprint ? Then using linux (or is it MacOS)

The Gutenprint plugin uses CUPS. Did you install the CUPS driver. There is one for your Epson https://www.openprinting.org/driver/epson-stylus-photo-t50-series/

A check using localhost:631 from your browser

Installed and working Gutenprint shows in the File Menu. You do need to set up the printer queue from Gutenprint. I find it works very well but that is for my needs. This kubuntu 20.04 / Gimp 2.10.32 from PPA. Do not expect Gutenprint to work if you are using a flatpak or a snap, for one thing it is installed in the wrong place.

Whichever print process used, have you set it to best quality printing. OHP transparencies are much the same as any photo-quality paper, the printer only prints to its capabilities and the image quality.

When it comes to TurboPrint, Many years ago, a bad experience with it and a Canon Printer. It would not use black ink only CMY. TurboPrint owner, not interested, but I understand it does have many happy users.

Many thanks Steven and Rich. I think I’m making headway. Yes I’m using Mac, and a check at localhost:631 suggests that CUPS is installed, as all the options for print settings are there and can be set, I used to dabble with Linux and when I switched to Mac I think I noted that CUPS is installed in Mac by default, although I could be wrong about that. Anyway, I think I’m on the right track now and will make test prints to see if I can get the fine quality needed for digital negatives. Thanks to all you your assistance.

Barry