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Author Topic: minimum DPI for optimal printed output?  (Read 634 times)

mwatkins

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minimum DPI for optimal printed output?
« on: February 07, 2017, 06:14:46 pm »
I was having problems with Scribus crashing because the total size of all my images files was too large. So now I'm in the process of reducing the file sizes. [I posted something about this on another board and got given some links by user GarryP with a lot of detailed info, but I suspect the answer I'm seeking is quite simple.]

I'm working with a few dozen A4-sized drawings which I scanned in at 600DPI, so the images are currently TIFFs, each in the order of 50-100MB. I realise now that this is unnecessarily high-res (in print, the images are going to appear typically 5-10cm wide/high).

In GIMP, I can separately set the DPI of, and resize, my images. But I'm finding it hard to get clear information on the optimal settings for images within a .sla as regards the final printed output.

I've noticed Scribus gives warnings when I export to PDF if an image is below 144DPI - what's the relevance of that figure? I also read somewhere I should be using "at least 300DPI" for printing purposes. But would higher DPI lead to a better image quality? Or is 300 some kind of cut-off above which it doesn't matter?

Some simple advice on how to resize/prepare images before inserting them into my .sla (for best printed results) would be very welcome. Thanks!

CGood

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Re: minimum DPI for optimal printed output?
« Reply #1 on: February 07, 2017, 10:06:33 pm »
If you are going to print at a print shop, can you print out representative samples of images and bring them to your printer to get their recommendations on dpi for your final output?

utnik

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Re: minimum DPI for optimal printed output?
« Reply #2 on: February 08, 2017, 07:31:04 am »
hi matthew

…a few dozen A4-sized drawings which I scanned in at 600DPI…
…in print, the images are going to appear typically 5-10cm wide/high…

so ypu'll end up with more than 1700 ppi!

Quote
…I'm finding it hard to get clear information on the optimal settings for images within a .sla as regards the final printed output.

i gave you some advice in the other thread!

Quote
I also read somewhere I should be using "at least 300DPI" for printing purposes. But would higher DPI lead to a better image quality?

depends on the effective print raster! – ask your printshop!

utnik

 

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