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About KOHHOKU Printing Co., Ltd.

At KOHHOKU Printing Co., Ltd., a leading direct mail printing company for major correspondence education providers and e-commerce companies, innovation drives efficiency. The company has revolutionized its operations by automating intricate direct mail printing and sealing processes, enabling them to offer cost-effective services with rapid turnaround times.

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“We’ve reduced machine downtime and boosted operational efficiency by 19%, speeding up our turnaround times and significantly raising customer satisfaction.”

Controlling Pitch: A Critical Element in Production

In the production of snap pack direct mailers, also known as pressure-sealed mailers, controlling the pitch between paper sheets in the initial printing process is critical and significantly affects the efficiency of subsequent processes. Poor humidity control can cause paper expansion or contraction, leading to pitch misalignment. In severe cases, this may necessitate a complete reprint.
A single occurrence of such failure not only results in financial losses ranging from $2,000 to $3,000, but it also significantly reduces productivity.

Paper expansion and contraction are highly delicate issues; even a 1mm deviation in a 100-inch pitch can lead to defects. Because our manufacturing processes are spread across different factory buildings, differing humidity levels have exacerbated the problem.

To address this challenge, we determined that optimizing humidity levels across all the factory buildings and printing processes was imperative. Leveraging our experience with the AirAKI® system, which had previously been installed in some buildings, we have extended its implementation to all facilities.

The Superiority of AirAKI®