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Laser toner
Laser toner is used in printers to create images on paper, similar to ink. In a complicated process, the toner is arranged on a drum which rolls the pattern onto sheets of paper. The papers then roll through heat which fuses the powder to the paper, creating the words or pictures on the printed sheets.
Laser toner comes in different sizes, depending on the image resolution. The standard size of the particles used to be 14-16 micrometers (one millionth of a meter), but in recent years, the size has shrunk to make 600 dots per square inch possible. Smaller particles make the resolution finer.
Laser toner may pose certain health risks. Due to its extremely small size, the powder can settle in the air much like dust can. Breathing these small particles can have adverse effects on people with respiratory problems like asthma or bronchitis.
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