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53. Unprinted areas in the stamp design: Printing gaps have a multitude of causes. Among them are problems resulting from water content at the time that the paper was moistened before intaglio printing, inadequate ink on the plate, cleaning solvent dissipating the ink, foreign matter on the paper such as hairs and bugs, a disengaged plate, a weak spot on an impression roller, problems with paper coating and bubbles in the ink. Most are minor and have more interest than cash value.
Type 53: A weak spot in the suspension roller left a strategically-placed "snowball" in Lockwood's face (Scott 2178).
Type 53: Inadequately wetted down paper prior to intaglio printing left this stamp with a light impression from inadequately adhering ink (Scott 565).
Type 53: Foreign matter, such as the insect that landed on this stamp, results in unprinted areas in the stamp design (Scott 319g).
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