Climate Transition
Establishment of a specialized, intermediate storage area between the raw warehouse and the active production floor prevents thermal shock and moisture condensation on paper rolls or pallets. This temperature-controlled space, called a thermal conditioning buffer zone, ensures that paper stock adjusts to the printroom temperature before it is unwrapped. Proper execution of this transition step prevents severe dimensional distortion of the fiber structure.
Temperature Equilibrium
Large masses of paper, such as heavy rolls or tightly packed pallets, require considerable time to change temperature due to the high thermal mass of cellulose and moisture. If a cold pallet is moved directly into a warm, humid print room, moisture from the air will condense on the cold paper surfaces, causing immediate swelling and wavy edges. This condensation occurs when the temperature of the cold paper is below the dew point of the warm air.
Placing the material in the transition zone allows the temperature to rise slowly and evenly throughout the block of paper without exposure to excess moisture. This gradual warming ensures that the moisture content remains stable across the sheet, preventing sheet-fed feeding jams and misregistration.
Production Control
The transition zone typically operates at the same temperature as the press room but is kept sealed from high-humidity areas. This setup permits efficient thermal adjustment while keeping the paper wrapped in protective barrier films.
