| 摘要 |
The image transfer medium, such as a carbon spot or microcapsule type of medium is provided with a protective overcoat which precludes smudging of an insert ply within the mailer form due to the rubbing of the face of the mailer form. The overcoat serves to preclude or greatly reduce an image transfer under a transversely applied rubbing force while allowing transfer of an image under impact force.
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