CALENDER TREATMENT DEVICE AND PRODUCTION OF MAGNETIC RECORDING MEDIUM USING THE SAME

摘要

PROBLEM TO BE SOLVED: To obtain a calender treatment device which decreases the frequencies of production line stoppage for the purpose of cleaning and exchanging of metallic rolls and improves productivity by retarding the progression of the microcracks of hard chrome plating which arise on the metallic roll peripheral surfaces of the calender treatment device and a process for producing a magnetic recording medium. SOLUTION: The thickness of the hard chrome plating to be applied to the surfaces of the metallic rolls 1a to 1d of the calender treatment device which executes the mirror finishing of the magnetic layer of the magnetic recording medium by passing this magnetic recording medium between plural pieces of the metallic rolls 1a to 1d and elastic rolls 2a to 2c or between the metallic rolls and the metallic rolls is specified to a range of 30 to 100μm.