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PZC Chatometry

A standard system to measure wood chatoyance

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    • Woodworker’s Guide to Chatoyance
    • Woodworker’s Guide to Chatoyance – Compact Edition

Boire

detarium spp., Fabaceae, Angiospermae (Hardwood)

reference picture – see below for more pictures

Other names: Amouk, Bodo, Boiré, Aboranzork, Énouk, Eñuk, Kapuyai

Chatoyance was measured by the chatometry.com team using the PZC method. The statistics for this specific timber are hereby summarized to provide an evaluation of data robustness:
Number of sources for samples: 5
Number of individual trees analyzed: 5
Number of specimens: 14
Number of measurements: 45
Max PZC read (of all measurements): 28.1
Min PZC read (of all measurements): 12.2
Max PZC average on one log: 25.2
Min PZC average on one log: 14.2
PZC Average of all logs: 18.6

Species: detarium spp.
Family: Fabaceae
Clade: Angiospermae
Description: Medium-sized tree native to tropical Africa, characterized by alternate, pinnately compound leaves, small flowers, and edible, fleshy drupes with a hard stone.
Other Local Names: Amouk, Bodo, Boiré, Aboranzork, Énouk, Eñuk, Kapuyai

Reference Colour: Red brown
Texture: Medium to coarse
Grain: Straight or interlocked
Interlocked Grain: Marked
Notes: Coppery brown wood with dark brown veins. Resin exudation is possible.

Diameter: 70÷100cm
Density @12% MC: 660kg/m³
Janka Hardness: 1170lbf
Crushing Strength @12%MC: 55MPa
Static Bending Strength @12%MC: 99MPa
Longitudinal Modulus of Elasticity E: 13.1GPa
Volumetric Shrinkage Coefficient: 0.38% per %
Total Tangential Shrinkage TS: 5.4%
Total Radial Shrinkage TS: 3.8%
T/R Anisotropy Ratio: 1.4-
Fibre Saturation Point: 24%
Thermal Conductivity: 0.22W/mk
Sapwood Thickness: 7÷10cm
Sapwood Demarcation: Clearly demarcated

Resistance to Decay: Class 3 – moderately durable
Resistance to Dry Wood Borers: Class D – durable (sapwood demarcated, risk limited to sapwood)
Resistance to Termites: Class M – moderately durable
Treatability: Class 2 – moderately treatable.
Use Class Covered by Natural Durability: Class 2 – inside or under cover (dampness possible) MAMBODÉ
Durability Notes: This wood is given as not very sensitive to marine borers.

Log Buoyancy: Floats
Log Conservation: Moderate (treatment recommended)

Sawing Machining Notes: Some difficulties with sawing and machining due to presence of resin. Tools must always be carefully sharpened.
Assembly Notes: Resin exudations: to be taken into account when gluing.
Additional Notes: Filling is recommended to obtain a good finish
End Uses: Turned goods, Interior joinery, Coffins, Built-in furniture or mobile item, Cabinetry (high-end furniture), Flooring, Stairs (inside), Sliced veneer, Panelling, Marquetry, Exterior joinery

Source 1: Tropical Timber Atlas, Editions Quae, e-ISBN 978-2-7592-2770-9

Pictures – each from a different individual tree:

Log 1 (from [Source 42]) – PZC = 17.1
Log 2 (D. Senegalensis from [Source 27]) – PZC = 22.3
Log 3 (D. Senegalensis from [Source 53]) – PZC = 14.3
Log 4 (D. Senegalensis from [Source 58]) – PZC = 13.8
Log 5 (D. Macrocarpum from Joey Montagut) – PZC = 24.3

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