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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

Panga Panga

millettia stuhlmannii, Fabaceae, Angiospermae (Hardwood)

reference picture – see below for more pictures

Other names: Panga-panga, Wenge, Awoung, Awong, Jambiré, Mpande

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: 3
Number of individual trees analyzed: 3
Number of specimens: 6
Number of measurements: 18
Max PZC read (of all measurements): 8.1
Min PZC read (of all measurements): 5.3
Max PZC average on one log: 7.3
Min PZC average on one log: 6.1
PZC Average of all logs: 6.7

Species: millettia stuhlmannii
Family: Fabaceae
Clade: Angiospermae
Description: Millettia stuhlmannii, commonly known as Panga Panga, is a medium to large deciduous tree native to East Africa. It is highly valued for its dense, durable, dark brown timber, widely used in flooring, furniture, and construction. It features pinnate leaves and produces small purplish-white flowers.
Other Local Names: Panga-panga, Wenge, Awoung, Panga-panga, Awong, Jambiré, Panga-panga, Mpande

Reference Colour: Dark brown
Texture: Coarse
Grain: Straight
Interlocked Grain: Absent
Notes: Sometimes brittleheart and grub hole. Wood yellow when fresh, becoming dark brown to black brown with light. Presence of alternate light and dark stripes.

Diameter: 60÷100cm
Density @12% MC: 870kg/m³
Janka Hardness: 2730lbf
Crushing Strength @12%MC: 85MPa
Static Bending Strength @12%MC: 144MPa
Longitudinal Modulus of Elasticity E: 21.05GPa
Volumetric Shrinkage Coefficient: 0.69% per %
Total Tangential Shrinkage TS: 9.1%
Total Radial Shrinkage TS: 5.9%
T/R Anisotropy Ratio: 1.5-
Fibre Saturation Point: 22%
Thermal Conductivity: 0.28W/mk
Sapwood Thickness: 2÷3cm
Sapwood Demarcation: Clearly demarcated

Resistance to Decay: Class 1-2 – very durable to durable
Resistance to Dry Wood Borers: Class D – durable (sapwood demarcated, risk limited to sapwood)
Resistance to Termites: Class D – durable
Treatability: Class 4 – non-treatable
Use Class Covered by Natural Durability: Class 4 – in ground or fresh water contact
Durability Notes: This species is listed in the NF EN 350 standard. According to the European standard NF EN 335 of May 2013, performance length might be modified by conditions in which it is used.

Log Buoyancy: Does not float
Log Conservation: Good

Sawing Machining Notes: Sawing and machining requires powerful equipment. Polishing is difficult. Apply a finishing wax by preference.
Assembly Notes: Risk of splitting when nailing. High specific gravity and wood tends to stain: gluing must be performed in compliance with the code of practice.
Additional Notes: Resistant to one or several acids
End Uses: Turned goods, Cabinetry (high-end furniture), Panelling, Exterior joinery, Interior joinery, Built-in furniture or mobile item, Flooring, Sliced veneer, Exterior panelling, Sculpture

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 11]) – PZC = 6.3
Log 2 (from [Source 58]) – PZC = 7.5
Log 3 (from FPL Parquet) – PZC = 6.6

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