Room too dry (RH < 40%)
High severitySymptoms
Static, tight-edged paper, variable registration, airborne dust
Probable causes
- Winter heating
- AC without humidification
- dry local climate
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The Print Guy · 2026-10-05
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Pressroom climate · TPG-213
Room too humid (RH > 65%)
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Pressroom climate · TPG-215
High room temperature (> 26-28 °C)
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Pressroom climate · TPG-216
Ambient dust in the room
Recurrent hickeys, specks in coating, unstable overall quality