To compensate for misregistration on a press, printers often ask that the colour black be set to overprint so that any misregistration cannot be seen. However, black fills placed over coloured panels or scans which have overprinted can still be seen through the black ink. Overprinting black is recommended for lines under 2pt thick or…
Overprinting: When and where should it be used? When does it cause problems? - Lyhnia
シュプリーム Overprint Knockout 【保存版】
Prepression: 2015
Overprinting Options
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Prepression: 2015
What is Overprinting & Overprint Preview in InDesign?
Prepression: 2015
Re: Background color for photo: paper or none? - Adobe Community - 11875317
Re: Background color for photo: paper or none? - Adobe Community - 11875317
ep.5 Overprint black & white pre-press corrections