how to print highest quality

Question

Hello everybody.

I have make a nice picture i would like to print. I have set my settings the way i see it recommended here the most. (Sheet size the same of paper size, 300 ppi).

But the image is very high defenition on my pc, but when printed, it turns to blurry.

Now my main document is 36 by 24 inch but when i print on a smaller scale i make a copy and adjust those to the same size as the paper i print on.

But my a3 is blurry on the same places as my a4.

Does anyone have an idea?

P.S. only strange thing i see here is when printing it says : "documentprofile: GIMP built-in sRGB". Wich i have no idea what it means or if it could be a cause.

THanks already!

-NM

Per Berntsen · Answer

What are the pixel dimensions of the image?

To print A4 at 300 ppi, you need 3508 x 2480 pixels.

PPI stands fpr Pixels Per Inch – the number of pixels used to print one inch on paper.

21 x 29.7 cm equals 11.693 x 8.267 inches. Multiply these numbers with 300, and you get 3508 x 2480.

To print A3 at 300 ppi, you'll need 4961 x 3508 pixels.

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