Missing color

Missing color is an error that can be obvious or subtle. To be a true error, one printing color must be totally and completely absent. Even a few traces present make this an interesting freak and not an error.

Be aware that some if not all colors can be removed chemically without disturbing other colors or tagging. Depending on exact composition, some colors can often fade readily leavig the others largely intact, even just under bright sunlight.  File:US honeybee error.jpg|US 25c honeybee, black litho printing missing (but not the black engraving). 

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