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: 11
Number of individual trees analyzed: 11
Number of specimens: 27
Number of measurements: 81
Max PZC read (of all measurements): 17.9
Min PZC read (of all measurements): 9.1
Max PZC average on one log: 17.5
Min PZC average on one log: 10.1
PZC Average of all logs: 12.3

Species: pterygota macrocarpa
Family: Malvaceae
Clade: Angiospermae
Description: Pterygota macrocarpa, commonly known as Koto, is a large tropical tree native to West Africa. It features simple, alternate leaves and produces distinctive, very large, woody, winged fruit (samaras). Its pale, strong, and workable timber is highly valued in manufacturing.
Other Local Names: Anatolia, Ofete, Éfok ayus, Aké, Awari, Kyere, Kefe, Poroposo, Kakendé, Ikame, African pterygota, Pterygota

Reference Colour: Creamy white
Texture: Medium
Grain: Straight or interlocked
Interlocked Grain: Slight
Notes: Wood cream white to light yellow, attractive flecked aspect on quartersawn. Unpleasant odour when green.

Diameter: 80÷90cm
Density @12% MC: 590kg/m³
Janka Hardness: 750lbf
Crushing Strength @12%MC: 54MPa
Static Bending Strength @12%MC: 96MPa
Longitudinal Modulus of Elasticity E: 13.14GPa
Volumetric Shrinkage Coefficient: 0.57% per %
Total Tangential Shrinkage TS: 9.6%
Total Radial Shrinkage TS: 4.5%
T/R Anisotropy Ratio: 2.1-
Fibre Saturation Point: 25%
Thermal Conductivity: 0.2W/mk
Lower Heating Value: 16820KJ/Kg
Sapwood Demarcation: Not demarcated

Resistance to Decay: Class 5 – non-durable
Resistance to Dry Wood Borers: Class S – susceptible (risk in all the wood)
Resistance to Termites: Class S – susceptible
Treatability: Class 1 – treatable
Use Class Covered by Natural Durability: Class 1 – inside (no risk of dampness) Atlas of Tropical Timber Species KOTO / PTERYGOTA*
Durability Notes: This species is listed in the NF EN 350 standard. Prone to blue stain.

Log Buoyancy: Floats
Log Conservation: Low (treatment necessary)
Drying Rate: Normal
Drying Risk of Distortion: High risk
Drying Risk of Case Hardening: No known specific risk
Drying Risk of Checking: High risk

Blunting Effect: Normal
Sawing Tooth: Ordinary or alloy steel
Machining Tool: Ordinary
Suitability for Peeling: Good
Suitability for Slicing: Good
Sawing Machining Notes: Tendency to woolliness in machining. Good finish with filling.
Assembly Nailing Screwing: Good
End Uses: Framing, Moulding, Boxes and crates, House framing, Veneer for back or face of plywood, Blockboard, Panelling, Fibre or particle boards, Glued Laminated, Sliced veneer, Interior joinery, Seats, Built-in furniture or mobile item, Marquetry

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