Quote:It was my understanding from what Rich said that a .pdf file can't have a transparent background?Yeah, the PDF specification includes transparency, however a PDF from Gimp is flattened (no transparency) Inkscape the same, You really need Photoshop ($20 / month) or maybe Acrobat ($15 / month)
A typical bit about it here: https://graphicdesign.stackexchange.com/...background. Lots of similar if you search.
Quote:Be at least 150 dpi300 ppi is the rule-of-thumb for photo quality. There will also be a maximum physical 'size' specified somewhere. 'size inches' x 300 = your image size in pixels. That will also allow a little scaling up or down. Any scaling loses quality, especially small text. However a tee-shirt print is never art gallery quality, it is a print onto (crumpled) cloth.
Quote:Have all types rasterized and Also where do I go in GIMP to set the Type to be rasterized?Gimp a bitmap / raster editor, no need to set anything.. A vector application such as Inkscape can export a png losing any vectors in the process.
Quote: Use CMYK colour mode and Saved as either EPS, PDF, PSD or PNGWondering when CMYK would arise. Gimp is a RGB editor, no CMYK. There is a plugin that can export a CMYK jpeg or psd however your best bet is not Gimp it is Krita. https://krita.org/en/
Really you should start and finish all of a project in CMYK colorspace but you can import an RGB image and convert the colour space to CMYK before exporting as a photoshop psd file. No PDF export in Krita (probably a good thing) and PNG does not support CMYK only RGB. Which makes me suspect that specification.
Most printing companies these days will take a RGB image with a warning that the colours can change. (read the advice here https://www.rgb2cmyk.org/about.html)
