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[[Image:Peg compound.JPG|thumb|left|Two types of compound; bearing surfaces of peg are visible as shiny bands]]
'''"Peg dope"''' (also '''peg paste''', '''peg stick''', '''peg compound''') is a substance used to coat the bearing surfaces<ref>{{cite web |url=http://www.lutherie.net/care.html |title=String Instrument Care |author=Paul Hostetter |access-date=8 September 2010 |quote=Pegs are tapered, and must contact the insides of the holes on both sides of the pegbox. The fit is very important, of course, as is the nature of the contacting surfaces there. Raw wood on raw wood never works well, so a preparation is usually applied to facilitate a smooth turning of the peg. }}</ref> of the tapered tuning pegs of [[string instrument]]s (mainly [[violin]]s, [[viola]]s, [[cello]]s, [[viol]]s and [[lute]]s ). Manufactured varieties are generally sold in either a small stick (resembling [[lipstick]]), a block, or as a liquid in a bottle. Commonly used home expedient treatments may include soap, [[graphite]], or [[talc]].
Peg dope serves two different (and almost conflicting) purposes. It both lubricates the peg shaft so it turns easily in the [[#Pegbox|pegbox]] and provides friction to keep the pegs from slipping with the force of [[Vibrating string|string]] tension. Tuning pegs that are well fitted and properly doped will both turn smoothly throughout an entire rotation and hold firmly wherever the player wishes.
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