dimanche 25 mars 2012

Purfling - first part

The purfling is that black and white line that runs around the instrument (which is in fact an inlay of three wood veneers)
Traditionally the color might have had aesthetic purpose, but the inlay itself definitely has a higher purpose in the strength and structure of the edge - this area being very fragile at the seam (where the ribs and the plates are glued together)
While some makers rely on pre-made purfling, we have been making our own.
The black is often pear wood which has been stained with logwood chips (along with my kitchen walls), and the white can be poplar or willow.
Once the veneers are glued together, strips of 2mm are cut and each edge carefully planed.

The purfling marker is a tool specifically designed for the purpose of marking where the channel will be cut to a perfectly set distance from the edge (and following the outline, hence the care that has to brought to the latest)
I must admit our purfling marker is particularly fancy and now quite rare.
The blades are set with a bit of purfling between then and the handle rest on the outline. the screws are for setting it.
However good the marker, when comes to the corners, this will have to be drawn free hand. Where the purfling meet in the corners, this is called the mitres. It usually takes me ages before I am happy with the [imagined] 8 mitres flawing in the 8 corners, each working as a whole as well as adjusting to the slightly individual shape of each corner.

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