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: 2
Number of individual trees analyzed: 2
Number of specimens: 5
Number of measurements: 15
Max PZC read (of all measurements): 8.6
Min PZC read (of all measurements): 6.7
Max PZC average on one log: 7.8
Min PZC average on one log: 7.4
PZC Average of all logs: 7.6

Species: ceiba pentandra
Family: Malvaceae
Clade: Angiospermae
Description: A large, tropical deciduous tree known as the Kapok tree, featuring a massive, often buttressed and spiny trunk, palmate leaves, and large pods filled with fluffy kapok fiber.
Other Local Names: Ceiba, Mapajo, Toborochi, Paneira, Sumauna, Bonga, Ceiba, Ceiba uchuputu, Guambush, Kumaka, Silk cotton, Fromager, Mahot coton, Ceiba, Huimba, Kankantrie, Koemaka, Ceiba, Ceiba yucca

Reference Colour: Creamy white
Texture: Coarse
Grain: Interlocked grain
Interlocked Grain: Slight
Notes: Logs must be treated, extracted, sawn and dryed as soon as possible after felling. Wood cream white to light yellow, often with greyish veins.

Diameter: 70÷180cm
Density @12% MC: 320kg/m³
Janka Hardness: 240lbf
Crushing Strength @12%MC: 22MPa
Static Bending Strength @12%MC: 36MPa
Longitudinal Modulus of Elasticity E: 5.08GPa
Volumetric Shrinkage Coefficient: 0.36% per %
Total Tangential Shrinkage TS: 6.3%
Total Radial Shrinkage TS: 3%
T/R Anisotropy Ratio: 2.1-
Fibre Saturation Point: 34%
Thermal Conductivity: 0.12W/mk
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 SUMAUMA Cross sections of Ceiba pentandra
Treatability: Class 1 – treatable
Use Class Covered by Natural Durability: Class 1 – inside (no risk of dampness)
Durability Notes: This species is listed in the NF EN 350 standard.

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

Blunting Effect: Normal
Machining Tool: Ordinary
Suitability for Peeling: Good
Suitability for Slicing: Not recommended or without interest
Sawing Machining Notes: Fuzzy surface. Frequent sharpening recommended.
Assembly Nailing Screwing: Poor
End Uses: Boxes and crates, Built-in furniture or mobile item, Veneer for back or face of plywood, Moulding, Veneer for interior of plywood, Blockboard, Insulation, Pulp

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