03-15-2018, 07:12 PM
Are these going to a commercial printer (aka printer) for printing?
If so, then look at their requirements. One might be a "bleed area" making the image more than "90 mm" Ask if they have a template, many printers have these.
Generally, Gimp works in pixels not millimetres, so the 90 mm has to be converted to pixels at a print resolution.
Make a new canvas like this using 300 ppi as the print resolution. https://i.imgur.com/tXrttnC.jpg
Add a transparent layer on top and make a circle to define a circular coaster. An example gimp xcfgz file attached to play with.
Any photgraph is liable to be too large (sometimes too small, never correct first time)
Copy it, paste it, resize it, move it while still a floating pasted layer: https://i.imgur.com/OQnewsa.jpg
Then it is a matter of anchoring the image, tidy up any unwanted bits. https://i.imgur.com/YWtMllr.jpg
You can use a selection to crop to a circle, not usually required for a printer, they take care of that. Turn off the visibility of the template layer before exporting as a (whatever the printer wants) https://i.imgur.com/K9zOry9.jpg
If so, then look at their requirements. One might be a "bleed area" making the image more than "90 mm" Ask if they have a template, many printers have these.
Generally, Gimp works in pixels not millimetres, so the 90 mm has to be converted to pixels at a print resolution.
Make a new canvas like this using 300 ppi as the print resolution. https://i.imgur.com/tXrttnC.jpg
Add a transparent layer on top and make a circle to define a circular coaster. An example gimp xcfgz file attached to play with.
Any photgraph is liable to be too large (sometimes too small, never correct first time)
Copy it, paste it, resize it, move it while still a floating pasted layer: https://i.imgur.com/OQnewsa.jpg
Then it is a matter of anchoring the image, tidy up any unwanted bits. https://i.imgur.com/YWtMllr.jpg
You can use a selection to crop to a circle, not usually required for a printer, they take care of that. Turn off the visibility of the template layer before exporting as a (whatever the printer wants) https://i.imgur.com/K9zOry9.jpg