How is the moisture content of paper controlled? The physical characteristics of paper vary based on moisture content, measured in grams of water per kilogram of dry material (g/kg). This is influenced by the relative humidity (%RH) in the storage environment, with characteristics tested according to ISO-187-2022 standards.
Quality issues often arise from improper humidity management during storage. Paper leaves the mill with a certified moisture content of 4-6% and is shipped in sealed reams or rolls. However, within a few days, the paper reaches equilibrium with the storage environment, which is typically not air-conditioned. In winter, cold, dry air can cause the paper to dehydrate, leading to significant losses.
To prevent these issues, it's crucial to acclimatise the paper in a controlled environment.
Learn more about it in the blog post written by Luca Brotto, Application Manager – HVAC Industrial: https://www.carel.com/blog/-/blogs/printing-under-control-find-out-how-to-effectively-control-humidity
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