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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

Zebrawood

microberlinia brazzavilensis, Fabaceae, Angiospermae (Hardwood)

reference picture – see below for more pictures

Other names: Zebrano, Allen élé, Amouk

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: 12
Number of individual trees analyzed: 14
Number of specimens: 36
Number of measurements: 111
Max PZC read (of all measurements): 25.3
Min PZC read (of all measurements): 11.4
Max PZC average on one log: 22.2
Min PZC average on one log: 13.6
PZC Average of all logs: 19.1

Species: microberlinia brazzavilensis
Family: Fabaceae
Clade: Angiospermae
Description: Microberlinia brazzavilensis is a medium to large evergreen tree native to Central Africa, highly valued for its distinctive, durable wood, often known as Zebrawood or Zebrano, characterized by dark brown stripes on a pale background, widely used in high-end furniture and flooring.
Other Local Names: Zebrano, Allen élé, Amouk, Zebrano, Zebrano, Zebrawood

Reference Colour: Light brown
Texture: Coarse
Grain: Interlocked grain
Interlocked Grain: Slight
Notes: Wood yellow brown to light brown, with dark brown veins. Sometimes highly interlocked grain.

Diameter: 60÷100cm
Density @12% MC: 790kg/m³
Janka Hardness: 1500lbf
Crushing Strength @12%MC: 62MPa
Static Bending Strength @12%MC: 110MPa
Longitudinal Modulus of Elasticity E: 17.52GPa
Volumetric Shrinkage Coefficient: 0.56% per %
Total Tangential Shrinkage TS: 11%
Total Radial Shrinkage TS: 8.8%
T/R Anisotropy Ratio: 1.3-
Fibre Saturation Point: 30%
Thermal Conductivity: 0.26W/mk
Sapwood Thickness: 6÷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 3 – poorly treatable
Use Class Covered by Natural Durability: Class 2 – inside or under cover (dampness possible) ZINGANA / ZEBRANO*

Log Buoyancy: Does not float
Log Conservation: Moderate (treatment recommended)
Drying Rate: Slow
Drying Risk of Distortion: High risk
Drying Risk of Case Hardening: No known specific risk
Drying Risk of Checking: High risk

Blunting Effect: Normal
Machining Tool: Tungsten carbide
Suitability for Peeling: Not recommended or without interest
Suitability for Slicing: Good
Sawing Machining Notes: Risk of tearing in the presence of highly interlocked grain.
Assembly Nailing Screwing: Good but pre-boring necessary
End Uses: Turned goods, Cabinetry (high-end furniture), Panelling, Tool handles (resilient woods), Built-in furniture or mobile item, House framing, Sliced veneer, Marquetry

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

Pictures – each from a different individual tree:

Log 1 (from Seralvo) – PZC = 23.1
Log 2 (from Seralvo) – PZC = 21.3
Log 3 (from Seralvo) – PZC = 12.4
Log 4 (from [Source 24]) – PZC = 21.4
Log 5 (from Evolution Panels and Doors) – PZC = 23.0
Log 6 (from [Source 1]) – PZC = 17.4
Log 7 (from [Source 25]) – PZC = 15.0
Log 8 (from [Source 20]) – PZC = 18.6
Log 9 (from P. Hinds) – PZC = 19.5
Log 10 (from [Source 27]) – PZC = 21.0
Log 11 (from J. B. Utay) – PZC = 21.9
Log 12 (from [Source 56]) – PZC = 19.5
Log 13 (from [Source 79]) – PZC = 16.7
Log 14 (from [Source 4]) – PZC = 18.8

See also
EPOXY RESIN

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