The impact of low temperature weather on paper

In printing production, paper is one of the consumables that requires extremely high environmental temperature and humidity. Paper is a porous material with a basic structure composed of plant fibers and auxiliary materials, which has strong hydrophilicity. If the environmental temperature and humidity are not well controlled, it will cause paper deformation and affect normal printing. Therefore, maintaining appropriate environmental temperature and humidity is the key to improving the quality of paper printing and improving production efficiency.

The environmental temperature requirements for ordinary paper are not so obvious, but when the environmental temperature is below 10 ℃, ordinary paper will become very "brittle", and the adhesion of the ink layer on its surface will decrease during the printing process, which is easy to cause deinking.

Gold and silver card paper is usually made from copperplate paper, whiteboard paper, white cardboard, and other materials, and then composite with PET film or aluminum foil. Gold and silver card paper has higher requirements for environmental temperature because both metal and plastic materials are very sensitive to temperature changes. When the environmental temperature is below 10 ℃, it will greatly affect the suitability of gold and silver card paper. When the storage environment temperature of gold and silver card paper is around 0 ℃, after being transported from the paper warehouse to the printing workshop, a large amount of water vapor will appear on its surface due to the temperature difference, affecting normal printing and even leading to waste products.

In addition, low-temperature drying, low relative humidity, and water exchange between paper and air can cause the paper to dry, warp, and shrink, resulting in poor overprinting.

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