Pens, ContinuedReservoir pens(Continued)Figure 2-42 illustrates the consequences of improper pen handling.Figure 2-42. —Defective ink lines.Pen carePen nibs and reservoir pens must be kept clean. Crusted ink will ruin adrawing that is in progress, rust a nib, and permanently freeze a technicalpen. Pen nibs are easily cleaned in warm water with a mild detergent. Usewater and ammonia to remove stubborn ink, When you are using anultrasonic cleanser, do not leave a reservoir pen in the cleanser for a longtime. Heat from the vibrating cycles will melt the retaining cap. Before youclean a reservoir pen, consider the following guidelines:thoroughly clean the pen before periods of nonuse,disassemble the pen only for thorough cleaning, andhandle all parts carefully.Continued on next page2-35
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