Means for reproducing graphic materials are explained. There are several types of processes: those using light sensitive material, those using heat sensitive material, those using photo conductive materials (electrophotography), and duplicating processes using ink. For each of these, the principles behind them are explained, the necessary materials are indicated, and drawings illustrating the process and photographs of the machines used are included. A final chapter helps a user decide which method is best and most economical for his need. The author argues that inexpensive means of reprography allow teachers to supplement their lectures with notes which may be more flexible than using textbooks. (JK)