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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

Boarwood

symphonia globulifera, Clusiaceae, Angiospermae (Hardwood)

reference picture

Other names: Azufre, Brea amarilla, Anani, Canadi, Mani, Machare, Puenga, Zaputi, Manni, Manil marécage, Brea-caspi, Mataki, Mangue, Paraman, Peramancillo

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: 1
Number of individual trees analyzed: 1
Number of specimens: 2
Number of measurements: 6
Max PZC read (of all measurements): 6.1
Min PZC read (of all measurements): 5.0
Max PZC average on one log: 5.7
Min PZC average on one log: 5.7
PZC Average of all logs: 5.7

Species: symphonia globulifera
Family: Clusiaceae
Clade: Angiospermae
Description: Symphonia globulifera is a medium to large evergreen tree with leathery, opposite leaves, producing small, yellowish-white flowers and globose, yellow-orange fruits. It is characterized by its distinctive reddish-yellow resinous sap.
Other Local Names: Azufre, Brea amarilla, Anani, Canadi, Mani, Azufre, Machare, Machare, Puenga, Zaputi, Boarwood, Manni, Manil marécage, Azufre, Brea-caspi, Mani, Mataki, Mangue, Mani, Paraman, Peramancillo

Reference Colour: Yellow brown
Texture: Medium
Grain: Straight
Interlocked Grain: Absent
Notes: Light brown to yellow brown.

Diameter: 50÷80cm
Density @12% MC: 710kg/m³
Janka Hardness: 990lbf
Crushing Strength @12%MC: 58MPa
Static Bending Strength @12%MC: 104MPa
Longitudinal Modulus of Elasticity E: 15.63GPa
Volumetric Shrinkage Coefficient: 0.61% per %
Total Tangential Shrinkage TS: 10.1%
Total Radial Shrinkage TS: 4.8%
T/R Anisotropy Ratio: 2.1-
Fibre Saturation Point: 29%
Thermal Conductivity: 0.24W/mk
Lower Heating Value: 18400KJ/Kg
Sapwood Thickness: 4÷8cm
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 S – susceptible
Treatability: Class 3 – poorly treatable
Use Class Covered by Natural Durability: Class 2 – inside or under cover (dampness possible) Atlas of Tropical Timber Species MANIL / MANNI*
Durability Notes: Treatability of Manil seems rather easy with oil-type preservation products. It is difficult with saline-type preservation products.

Log Buoyancy: Does not float
Log Conservation: Low (treatment necessary)
Drying Rate: Normal
Drying Risk of Distortion: High risk
Drying Risk of Case Hardening: Yes
Drying Risk of Checking: High risk

Blunting Effect: Normal
Machining Tool: Ordinary
Suitability for Peeling: Good
Suitability for Slicing: Good
Assembly Nailing Screwing: Good but pre-boring necessary
Assembly Notes: Risk of splitting when nailing.
End Uses: Heavy carpentry, House framing, Boxes and crates, Flooring, Veneer for back or face of plywood, Sliced veneer, Panelling, Pulp, Interior joinery, Marquetry, Built-in furniture or mobile item, Cooperage, Moulding

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

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