Ricoh Pro 8120s Gebruiksaanwijzing - Pagina 7
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1. Characteristics and Conditions of
Paper
This chapter describes the characteristics and conditions of paper.
Characteristics of Paper
This section describes how the characteristics of paper affect the quality of printing and the movement of
paper in the machine.
There are many types of paper. The paper you use should satisfy the conditions noted in page 8
"Paper Specifications".
Composition of Paper
• Do not use acidic paper because it accelerates the deterioration of the photoconductor unit and
surrounding parts.
Paper that uses ground-wood pulp and cotton contains calcium carbonate (CaCO
) and other natural
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impurities. Do not use paper whose calcium carbonate ratio is high because calcium carbonate reduces
the life of the OPC drum and fusing unit. For the values for the calcium carbonate ratio, see page 8
"Paper Specifications".
Do not use coated paper that contains components that dissolve or vaporize when exposed to high
temperatures.
Friction Characteristics
The friction characteristics of paper are important to transfer the paper correctly from the paper tray
through the inside of the machine.
If the paper's friction coefficient is too large or too small, the paper may not feed correctly through the
machine. If the friction coefficient is not uniform, it is likely to feed multiple sheets at one time.
Use printing paper with uniform friction characteristics to print from the machine. For the values for the
friction coefficients, see page 8 "Paper Specifications".
Surface Smoothness
The smoothness of the surface of the paper is important to get high print quality and also stable paper
feeds.
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