Technical LibraryACTION IV: Plectra material Entire Contents Copyright ©2006 CBH |
Delrin vs Celcon… Delin® is a homopolymer acetal resin patented by DuPont in 1956, and marketed from 1960 with many inital applications including car gearboxes. The natural slipperiness and property retention of Delrin makes it an ideal material for harpsichord plectra, which must obviously bend and return to shape tens of thousands of times over their life.
Celcon® is a copolymer acetal resin marketed by Celanese in 1961, although it wasn’t until the late 1980s that it was first tried for harpsichord use. It has proven very popular with the US makers, but perhaps not so in tradition-bound Europe. Most celcon is colored black.
Nominal sizes are as follows:
The large wedge profile is particularly useful for revoicing certain instruments where the standard wedge profile might slip through the tongue mortise. The larger size also makes the quills easier to pick up and handle. We recommend the normal thickness (.020˝) plectra for unison choirs, and the thin (.015˝) to save voicing time for the 4´ choir. No matter what quill material is used, the blanks must be voiced in the instrument.
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