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Concept
Libidibia ferrea
Résumé
Libidibia ferrea, formerly Caesalpinia ferrea, and commonly known as pau ferro, Jucá, Brazilian ironwood, morado, or leopard tree, is a tree found in Brazil and Bolivia.
Most species of Caesalpinia s.l. have poorly defined growth rings, with isolated vessels arranged in radial multiples. Pitting between vessels is alternate and covered, and fibres are generally not divided by a septum. The axial (i.e., longitudinal) parenchyma varies from a winged shape to confluent, and is irregularly storied (i.e., layered), while the rays (perpendicular to growth rings) are of variable height and generally comprise a single or double cell width. Libidibia in particular has layered longitudinal parenchyma and narrow homocellular (i.e., of uniform type) rays without crystals in the ray cells.
Its wood is often used for making fingerboards for electric guitars and basses. It has a similar feel and similar tonal attributes to rosewood, but is near 1000 points softer on the janka hardness scale on average or more than all of the commonly traded species of rosewood except for Sisso and Amazonian rosewood. It also ranks lower in density of 5-10lbs per cubic foot compared to common rosewoods (roughly 54lbs/cf compared to 60-66lbs/cf). Though it does have a negligibly higher crushing strength and modulus of rupture than a few species of rosewood. Pau Ferro is lighter colored having more tans and light browns contrasting darker areas of its figure . The wood may also be used for flooring, fancy furniture, and handgun grips. It is also known by the names morado, palo santo, caviuna, Brazilian ironwood, and Bolivian rosewood, though it is not actually rosewood.
In guitar making, pau ferro is mainly used for fingerboards and bridges. Some luthiers also use it for the back and sides of acoustic guitars. The Brazilian guitar company Giannini uses laminated pau ferro in many of their classical guitars.
Although similar in many ways to rosewood, pau ferro has slightly different qualities: Its coloration ranges from coffee brown to yellow brown and purple.
Source officielle
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