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I have constructed a Mandelbrot image using my own small python script. I am toying with the idea of taking it to a shop to have it printed on a 50x70cm poster to hang on the wall.

I know nothing of printing, and would like to not ruin the result too much in my ignorance.

Below is the picture I've made (it's somewhat low resolution here because of file size limitations; as it is digitally constructed, naturally I can make it in any resolution I want, and I suppose that when I get that far, I'll look at the prices for 150 vs 300 vs 600 ppi to see if I care enough to pay for it).

enter image description here

I like that it is mostly black, and the I like the (almost) monochrome blue. I am somewhat satisfied with the level of banding (always an issue with dark colors). I like the colors as I see them on my screen. I think I like the off-center composition, although I might move the motive a little bit to the left.

However, I am uncertain how much of it translates to a poster. Should the curve be made thicker, or brighter, or both? I am afraid that especially the small details (all the lightning-like branching, and the smaller copies of the bulb) may become nearly invisible, but on the other hand, turning them up will probably give me banding elsewhere.

And what can I expect for the color? Heck, the colors looks different between my image viewer and my internet browser; the browser shows a clear blue, while my image viewer shows a more purple color. I have no idea what a poster printer might do.

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    Print a small proof first – joojaa Nov 8 '20 at 21:35
  • Is this to be a one-off poster? (Only 1 printed). Are you looking at a run of multiple posters via a commercial printer? That amount of black coverage is not easily maintained in a run, and for a one-off can be hit or miss.. the problems are far less about the blue and are more about the overwhelming amount of black. You'd be better of screen printing blue on a black substrate. However, screen printing can be problematic for minute details. – Scott Nov 9 '20 at 5:22
  • @Scott Yeah, it's a one-off. (First I thought you were asking whether you were ever going to see me on this forum again. Synonyms are harsh some times.) – Arthur Nov 9 '20 at 6:34
  • For a one off.. just take a PDF to your local copy shop. Chances are they have a very similar digital printer as would be used for any online vendor. You aren't going to get "commercial" quality, but you can still get a decent print for a one-off. And costs should be quite minimal, so running it 2 or 3 times with some adjustments shouldn't be too costly. Of course, that all depends on how important it is to you. -- And no.. :) You're very welcome here. 'One-off' is a common term for a 1 print. :) – Scott Nov 9 '20 at 6:36

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