[Scribus] Gradients onPhotocopies

avox avox
Sun Oct 29 17:08:57 CET 2006

hovergo wrote:
> Does anyone know how to get greyscale or grey gradients on a photocopier.
> Most seem to do black or nothing.

Yes, photocopiers are usually calibrated to have a high dot gain. That
enhances contrast and ensures crisp text.

For photos you need to rasterize them (called applying a halftone) so that
the photocopier "sees" 
single dots instead of a gradient. Before that you should also adjust the
brightness to make the picture 
at least 50% brighter. The dot gain ensures that the copied photo is darker.

If you have a good photocopier just increasing the brightness might give you
good results already.

For gradients you would have to apply the same technique as for photos, but
you may have difficulties 
in applying the rasterizing effect on gradient areas. Try some checkered or
hashed pattern instead of
a solid fill for the gradient area.

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