Question

Resizing scanner image

Jan 13, 2016 8:14AM PST

Hello everyone,

Appreciate the forum. I have a 17"x24" charcoal artwork piece that I'm trying to use as a beer label. So, I started by scanning the image in color at 600dpi. I sent it to the label printing company, and they said it was too big, and when it was resized the resolution was too low. They told me to resize it on my end and send it again.

My question is, is there a difference between using something like photoshop to resize the original, large scan to something smaller, and actually rescanning the image at 600dpi while setting the scanner to produce a smaller image as it scans? The labeling company said there is a difference, but I don't understand why. I also don't want to spend the money rescanning it if I can avoid it. Can I just resize it in Photoshop, or does that destroy the resolution? And if it I can't just resize it, how do I get I high resolution 2.5"x3.5" photo with a 17"x24" original? Any help would be great!!

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Answer
I can't guess what they meant by too big.
Jan 13, 2016 8:48AM PST

I wonder if they were griping about the file size?

Anyhow I can't guess what photoediting you use but most print shops have guides for file submission.

That said, images can be resized by more than one method. But I have to know the DPI of the print shop before I resize. It would be awful to resize at 600dpi when the litho is out at 2400.

What's the print DPI?

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The scanner was set to 600 DPI when I scanned the original
Jan 13, 2016 9:03AM PST

Also, what does litho mean. Needless to say photo editing is not my strong suit. I thought that making the image smaller wouldn't cause problems, but for some reason the printing company wanted me to submit it in the actual size I wanted it to be printed. So now I'm trying to shrink my huge charcoal drawing to a tiny, but high res, label. Just an FYI, the file memory size wasn't the problem, it was the size in dimensions for some reason. The PDF image was definitely too big for their uploaded, but I sent it to them via Dropbox with no problems

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When you hit a new term, google?
Jan 13, 2016 9:16AM PST
https://en.wikipedia.org/wiki/Lithography or wikipedia.

In printing the size is not in inches but how the DPI and the image size translates to. So your 600 DPI image is 4 times smaller in inches when printed at 2400 DPI.

If you keep the same inches the result could be unacceptable.

So let's get the DPI of the printer first.
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according to their customer service,they print max of 300dpi
Jan 13, 2016 9:45AM PST

Knowing this, is it better to submit something at exactly 300dpi, rather than a higher resolution of 600dpi? Your explanation makes perfect sense btw...by your logic, my current image is 600dpi at 17.5x24, so at a dimension of 2.5x3.5, it is about 4,200dpi? Continuing that train of thought, resizing the original on photo editing software would increase its resolution?

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Yes. You submit at the DPI they print at.
Jan 13, 2016 11:20AM PST

More or less and it's not exactly as submitted.

As to the train, we would have to agree that more DPI is more resolution.

But to the topic, you want to set your canvas at a dimension of 2.5x3.5 300DPI and paste the image there to see if the graphic app will offer to size to fit. Or go ahead and resize to 2.5x3.5 then change the dpi to 300.

That way you can see exactly what might print.

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Thank you!
Jan 13, 2016 11:53AM PST

Really appreciate it R. Proffitt, I think I have a pretty good understanding of what I need to move forward. Thanks for walking me through everything

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