Brother International HL 1850 Users Manual - English - Page 179

APPENDIX ♦ Acid Paper and Neutralized Paper Paper can be classified as either acid paper or neutralized paper. Modern methods for making paper started with acid paper, but neutralized paper is taking the place of acid paper because of environmental or preservation issues. However, many forms of acid paper can be found in recycled paper. We recommend that you use neutralized paper for this printer. You can use an acid paper check pen to distinguish acid paper from neutral paper. ♦ Print Surface The characteristics may differ a little between the face side and reverse side of a sheet of paper. Usually, the opening side of the ream of paper package is the print side. Follow any indication of the print side on the paper package. Typically, the paper side is indicated with an arrow. ♦ Moisture Content Moisture content is the amount of water left in the paper after it has been made. It is one of the important characteristics of the paper. This can change greatly depending on where the paper is stored, although usually paper is 5% water by weight. Because paper often absorbs water, the amount of water can sometimes be about 10% in a high humidity environment. When the amount of water increases, the characteristic of the paper changes greatly. The fixing of the toner may become worse. For storing of the paper and during use, we recommend that the humidity of the surrounding environment is between 50% and 60%. A-9