As always, the best thing to do is work closely with your printer and give them what they want.

The printer that JoeyF is using, gotprint, wants CMYK. Here's a reference from the gotprint web site: "We require that you provide us with print-ready digital files in CMYK color mode. Provide all black and white artwork in grayscale color mode. We do not accept any other color mode." They also want 350 dpi photos/images: "In order for an image to print correctly, all file formats must be submitted at a resolution of 350 dpi at 100% of the final print size." 300 dpi works for me, and 350 is even better.

See: "What type of print-ready file formats are acceptable for uploads?" for a comparison of the formats.


-----Original Message----- From: Steve Kinney
Sent: Monday, February 15, 2016 4:22 AM
To: GIMP User List
Subject: Re: [Gimp-user] How to shrink photo, retain quality?? Business card design


I'm not sure that converting images from RGB to CMYK and exporting
to TIFF serves any real purpose.  I used to do that - up until about
ten years ago - but none of the print shops I have had dealings with
since require it.  PDF makes it a moot point, in the sense that
print shops will not know the difference between a PDF file with
embedded PNG or TIFF files.

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