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: 17
Number of individual trees analyzed: 23
Number of specimens: 70
Number of measurements: 210
Max PZC read (of all measurements): 17.1
Min PZC read (of all measurements): 8.5
Max PZC average on one log: 15.5
Min PZC average on one log: 9.8
PZC Average of all logs: 12.6

Species: quercus petraea, q. pubescens
Family: Fagaceae
Clade: Angiospermae
Description: Quercus petraea (Sessile Oak): Deciduous tree with lobed leaves on short stalks and stalkless acorns. Quercus pubescens (Downy Oak): Deciduous tree characterized by downy undersides of its lobed leaves and young shoots.
Other Local Names: Eiche, Roble, Chêne, Chêne blanc européen, Quercia

Reference Colour: Light brown
Texture: Medium
Grain: Straight
Interlocked Grain: Absent
Notes: Light brown wood to straw colour turning darker with light. The texture is “medium” but can be “fine” or “coarse” depending on origin. The pearly white silver figure is large and clearly visible.

Diameter: 40÷80cm
Density @12% MC: 740kg/m³
Janka Hardness: 1260lbf
Crushing Strength @12%MC: 58MPa
Static Bending Strength @12%MC: 105MPa
Longitudinal Modulus of Elasticity E: 13.3GPa
Volumetric Shrinkage Coefficient: 0.44% per %
Total Tangential Shrinkage TS: 9.7%
Total Radial Shrinkage TS: 4.5%
T/R Anisotropy Ratio: 2.2-
Fibre Saturation Point: 31%
Thermal Conductivity: 0.24W/mk
Lower Heating Value: 18390KJ/Kg
Sapwood Thickness: 1÷4cm
Sapwood Demarcation: Clearly demarcated

Resistance to Decay: Class 2-4 – durable to poorly durable
Resistance to Dry Wood Borers: Class D – durable (sapwood demarcated, risk limited to sapwood) OAK Cross sections of Quercus robur
Resistance to Termites: Class M – moderately durable
Treatability: Class 4 – non-treatable
Use Class Covered by Natural Durability: Class 3 – not in ground contact, outside
Durability Notes: This species is listed in the NF EN 350 standard. Durability is linked to the presence of water soluble tannins. It decreases with the washing of tannins in cases of exposure to harsh conditions. 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: Not applicable
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
Sawing Tooth: Stellite-tipped
Machining Tool: Tungsten carbide
Suitability for Peeling: Good
Suitability for Slicing: Good
Sawing Machining Notes: Slicing after steaming.
Assembly Nailing Screwing: Good but pre-boring necessary
Assembly Notes: Gluing must be done with care: wood is dense, slightly acidic, rich in tannins, and prone to stain. Nail or screw corrosion if in contact with humidity.
Additional Notes: Risk of tannin smudges on woods if not well dried or if processed in a non, protected, area without any protection or finish
End Uses: Turned goods, Flooring, Coffins, Sliced veneer, Heavy carpentry, Seats, Cabinetry (high-end furniture), Marquetry, Stairs (inside), Cooperage, Exterior joinery, Hydraulic works (fresh water), Interior joinery, Sleepers, Moulding

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