Method of developing electrostatic images
 A method of developing electrostatic images with a two component developer avoids the break-in period of developer by providing a fresh mixture of carrier and toner, which toner has a first particle size but replenishes the mixture in use with toner having a second particle size larger than the first particle size. This compensates for the tendency of electrostatic images to preferentially attract the larger particles in a toner mixture. 
Eastman Kodak Company
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Dinesh Dennis E. James H.
Tyagi Demeyer Anderson