Control of Sheet Moisture.

Proper moisture level with a minimum of variability is necessary in paper to insure good performance on the press. The proper moisture content varies with the class of paper and the conditions under which it is to be printed. Moisture determinations can be made in a number of ways. The most practical and most widely used method is with the Cambridge Sword Hygrometer. Close calibration and proper use is required of the sword. For use in controlling moisture on the paper machines it is necessary to find the relationship between sword readings and percent moisture in the paper. Control of moisture on the paper machine can be accomplished automatically by different methods. Preventing loss of moisture during cutting and inspection is accomplished by proper humidification of buildings. Higher level of moisture and more uniformity in paper going to the customer is realized.