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I take them photos, they are too large for a scanner, 70/50cm.

I see, yeah I have the same problem with mine because I usually use 35x25cm sheets. I've seen big scanners used in offices and pro designers but they are really expensive, I guess I'll have to get a nice camera and good lighting hahaha.

Thanks George!

Good lighting can make better work than the scanner. I photographed most of my artworks at my backyard around 4 at the afternoon. Perfect light!