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): 16.6
Min PZC read (of all measurements): 12.5
Max PZC average on one log: 14.2
Min PZC average on one log: 14.2
PZC Average of all logs: 14.2

Species: hura crepitans
Family: Euphorbiaceae
Clade: Angiospermae
Description: Hura crepitans, commonly known as the Sandbox or Dynamite Tree, is a large tropical tree characterized by its spiny trunk and branches. It is most famous for its distinctive, pumpkin-shaped fruit that explodes loudly when dry, scattering seeds. The tree also produces a highly poisonous milky sap.
Other Local Names: Ochoho, Assacu, Ceiba lechosa, Habillo, Possumwood, Sandbox, Bois du diable, Sablier, Catahua, Possum, Possentrie, Ura wood, Ceiba habillo, Jabillo

Reference Colour: Creamy white
Texture: Coarse
Grain: Straight or interlocked
Interlocked Grain: Slight
Notes: Bark contains a sap that is a strong irritant. Colour varies from cream white to pinkish brown. Presence of tension wood.

Diameter: 70÷100cm
Density @12% MC: 450kg/m³
Janka Hardness: 450lbf
Crushing Strength @12%MC: 31MPa
Static Bending Strength @12%MC: 56MPa
Longitudinal Modulus of Elasticity E: 9.6GPa
Volumetric Shrinkage Coefficient: 0.37% per %
Total Tangential Shrinkage TS: 4.7%
Total Radial Shrinkage TS: 2.9%
T/R Anisotropy Ratio: 1.6-
Fibre Saturation Point: 27%
Thermal Conductivity: 0.16W/mk
Sapwood Thickness: 15÷25cm
Sapwood Demarcation: Not clearly 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) Notes. Very prone to blue stain. AÇACU / SANDBOX*
Durability Notes: Very prone to blue stain. AÇACU / SANDBOX* Cross sections of Hura crepitans

Log Buoyancy: Floats
Log Conservation: Low (treatment necessary)
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: Fairly high
Sawing Tooth: Stellite-tipped
Machining Tool: Tungsten carbide
Suitability for Peeling: Good
Suitability for Slicing: Not recommended or without interest
Sawing Machining Notes: Log turning sawing recommended to avoid shakes (tension wood). Fuzzy surface.
Assembly Nailing Screwing: Poor
Additional Notes: Açacu is a possible substitute for Obeche (Triplochiton scleroxylon). Careful sanding, and filling are recommended to obtain a good finish
End Uses: Matches, Built-in furniture or mobile item, Formwork, Model building, Boxes and crates, Blockboard, Floats, Fibre or particle boards, Veneer for interior of plywood, Marquetry, Interior joinery

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