Knowledge / Safety Measures / Chalky Overprints / Mistakes

Chalky overprint mistake: printers term for a deviation caused by a chalky overprint mistake

Missing chalky overprint: postage stamp with not printed chalky overprint caused by mistake

Shifted chalky overprint: postage stamp with shifted chalky overprint to another position as intended caused by mistake

Double chalky overprint: postage stamp with twice in-stead of once the same chalky overprint caused by mistake

Chalky overprint on reverse: postage stamp with chalky overprint on reverse instead of front caused by mistake