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Thermal printers do not use any ink or toner.  Rater, they use direct-thermal paper, which turns black in response to heat.  These printers are limited to black printing only, and the final product can be destroyed sunlight, hot surfaces, or friction.  However, they are inexpensive and convenient for a number of purposes, including shopping receipt printing and label production.
 
Thermal printers do not use any ink or toner.  Rater, they use direct-thermal paper, which turns black in response to heat.  These printers are limited to black printing only, and the final product can be destroyed sunlight, hot surfaces, or friction.  However, they are inexpensive and convenient for a number of purposes, including shopping receipt printing and label production.
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The most common form of thermal paper contains [[bisphenol A]], which raises health concerns because the substance transfers to the skin of the person holding the paper.  BPA is then absorbed by the skin to varying degrees.<ref>Sandra Biedermann, Patrik Tschudin, & Koni Grob, "Transfer of bisphenol A from thermal printer paper to the skin", ''Analytical and Bioanalytical Chemistry'', September 2010, Volume 398, Issue 1, pp 571–576</ref>
 
====Care and maintenance====
 
====Care and maintenance====
 
Since no ink is used, thermal printers tend to stay fairly clean.  However, paper fragments and dust can still build up, so these should be cleaned from time to time.  Compressed air and/or a damp cloth can be used to clean it manually.  Some printers can also be cleaned by feeding through a cleaning card.
 
Since no ink is used, thermal printers tend to stay fairly clean.  However, paper fragments and dust can still build up, so these should be cleaned from time to time.  Compressed air and/or a damp cloth can be used to clean it manually.  Some printers can also be cleaned by feeding through a cleaning card.
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