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: 10
Number of individual trees analyzed: 16
Number of specimens: 51
Number of measurements: 153
Max PZC read (of all measurements): 17.6
Min PZC read (of all measurements): 8.3
Max PZC average on one log: 16.8
Min PZC average on one log: 8.9
PZC Average of all logs: 12.7

Species: fraxinus excelsior
Family: Oleaceae
Clade: Angiospermae
Description: Fraxinus excelsior (European Ash) is a large, fast-growing deciduous tree featuring opposite, pinnate leaves with 7-13 dark green leaflets. Its bark is smooth and grey when young, developing deep fissures with age. It produces distinctive clusters of winged seeds known as samaras or “ash keys.”
Other Local Names: Esche, Fresno, Frêne, Frassino

Reference Colour: Creamy white
Texture: Coarse
Grain: Straight
Interlocked Grain: Absent
Notes: Creamy white wood when fresh, it turns yellow with light. Sometimes wavy grain. Heart of some logs is marked with veins or black areas.

Diameter: 40÷100cm
Density @12% MC: 680kg/m³
Janka Hardness: 1530lbf
Crushing Strength @12%MC: 51MPa
Static Bending Strength @12%MC: 113MPa
Longitudinal Modulus of Elasticity E: 12.9GPa
Volumetric Shrinkage Coefficient: 0.48% per %
Total Tangential Shrinkage TS: 9.6%
Total Radial Shrinkage TS: 5.7%
T/R Anisotropy Ratio: 1.7-
Fibre Saturation Point: 32%
Thermal Conductivity: 0.23W/mk
Lower Heating Value: 17850KJ/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 2 – moderately treatable.
Use Class Covered by Natural Durability: Class 1 – inside (no risk of dampness) Notes. This species is listed in the NF EN 350 standard. ASH
Durability Notes: This species is listed in the NF EN 350 standard. ASH Cross sections of Fraxinus excelsior

Log Buoyancy: Not applicable
Log Conservation: Moderate (treatment recommended)
Drying Rate: Normal to 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
Sawing Tooth: Stellite-tipped
Machining Tool: Tungsten carbide
Suitability for Peeling: Good
Suitability for Slicing: Good
Sawing Machining Notes: Ash wood has a good aptitude for bending.
Assembly Nailing Screwing: Good but pre-boring necessary
Assembly Notes: Very porous and slightly acidic: to be taken into account when gluing.
Additional Notes: This wood is particularly, renowned for its flexibility, (aptitude for bending) and its, resistance to impacts
End Uses: Arched goods, Turned goods, Coffins, Cabinetry (high-end furniture), Tool handles (resilient woods), Interior joinery, Flooring, Sliced veneer, Seats, Cooperage

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