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Q: At what dpi should I scan my photos for print production?
Answer(s) to this Question (
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Finding the "Sweet Spot."
To get the best image from your scanner, try scanning a sheet of white opaque paper that is large enough to cover the entire bed. Set the resolution to 72 dpi and scan into an image-editing program. Use the "equalize" control to exaggerate minor differences within the image area. You will see an area (hopefully) that doesn´t have any blotches. Once you´ve determined where your scanner´s "sweet spot" is located, make a cardboard template to aid your positioning for any future scanning.
Line Art Scans
The problem with line art is that you don´t have the luxury of anti-aliasing (eliminating jagged edges with the process of adding steps of gray). Scan line art at the same resolution and size as the output device. If you are printing the work at 100% and at 600 dpi, scan at 100% at 600dpi. If the final work is to be 50% of the original size, adjust accordingly, i.e.: scan 50% at 600 dpi for an image to be 1/2 the size of the original with 600 dpi output; or scan at 100% at 300 dpi and reduce the image by 50% in your image manipulation program
Scan for Print
SAVE SAVE SAVE immediately upon scanning an image, before you touch any controls. For print, you want to save as a TIFF or EPS; TIFF images can be imported into page layout programs. EPS files are used when a clipping path and/or CMYK separations are used.
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