Question: what does the screening defect tag refer to? I've looked at the scans in this section and don't see a connection.

basically it's moire effect(try to full zoom in, then go back to the normal size, and you'll see lines)...i'm trying to fix it a bit before uploading, but whoever scanned these did a terrible scan. The only fault tag i can't understand is the binding discoloration...i've looked at some posts with that tag, and i still see nothing wrong. Though it could be me being blind ヽ( >∀<)ﾉ

401 screening images now >.< This could take a bit to get them all done :(

From context I'd imagine Binding Discolouration would be fading where the book was bound, or other artifacts of a similar nature (the binding glue causing discolouration maybe?). Just a guess but it seems fairly logical.

Mainly use binding discoloration to refer to the 'shadow' you can't get the scan flat - http://moe.imouto.org/post/show/34555 is a good example (Look at the left side)

Oh...now i see..makes sense. I didn't know how to call that fault.

Thanks for the info. So are there people who can fix binding discoloration?

imo it's pretty impossible to fix...unless you manage to somewhat sharpen that bit.

Cropping is an option, but it screws up the scan. The only real option is to debind the book before scanning.

It doesn't always cause significant blurring, depending on the binding and the scanner; if it's just darkening it a bit, you can brighten it. It's difficult to get right, though.

Radioactive said:
Mainly use binding discoloration to refer to the 'shadow' you can't get the scan flat - http://moe.imouto.org/post/show/34555 is a good example (Look at the left side)

Ah, that makes sense, did vaguely wonder exactly what it meant :)