(01-03-2019, 06:32 PM)rich2005 Wrote: The printer is correct. You can print any image any size and the relationship between printed size and ppi holds good. A guess; they let the printer software do the scaling.
Example: This image with transparency is about 2700 x 2500 pix
I can print it about 8.5" x 8.5" @ 300 ppi which is photo quality. https://i.imgur.com/Qdx6OfW.jpg That size good enough for a T-shirt.
or without leaving Gimp
I can print it on a smaller bit of paper size 3" x 3" @ 860 ppi https://i.imgur.com/X3aOz1w.jpg Good for a small Sticker.
Will I get any better quality at 860 ppi? No, I just get a smaller image at whatever quality setting the printer uses.
Do whatever you are comfortable with. Some points to consider.
Quote:I'd like to work with the 7632x6480 file size, so I can sell all products, and make only one file
Your camera image 5520x4144 pix might be 10 MB as a jpeg but as an edited png with transparency, (as required for Stickers) about 130MB - What size at 7632x6480 pix??? - Is there any advantage in scaling up, probably not, up to you.
The advantage of scaling up is that if I do that, some products become available, (per example "Womens A-Line Dress" 6310x6230 pixels - "Scarves" 5748x5748 pixels - "Wall Tapestries" 7632x6480 pixels," Duvet Covers" 7632x6480 pixels, and a few others.)
How much quality loss is there is what concerns me. For 6310x6230 and 5748x5748 I figured not much, but for 7632x6480 and 1700x1700 (when downscaling, which you have given an useful pointer in the previous post which I am going to use ) I've been trying to find out these last weeks.
Another subect I have been researching and haven't found a solid answer, regarding the printers at Redbubble, If I for example:
- I can print it on a smaller bit of paper size 3" x 3" @ 860 ppi https://i.imgur.com/X3aOz1w.jpg Good for a small Sticker.
Will I get any better quality at 860 ppi? No, I just get a smaller image at whatever quality setting the printer uses. -
Can I make that 1,720 ppi and double the image size, 6"x6", and would it give the same definition as 3"x3" @ 860, or the threshold is set at a fixed point? I would do that to get bigger stickers. I have found so many different answers these past weeks that I'm going to need a few days to regroup and process all I have read about it, and then come to a conclusion, and put that to use in my work.