gluta spp., Anacardiaceae, Angiospermae (Hardwood)

Other names: Gluta, Tembaga, Torotoro, Jalang, Kerbau, Thayet-thitsi, Rakban, Son
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: 3
Number of individual trees analyzed: 3
Number of specimens: 4
Number of measurements: 18
Max PZC read (of all measurements): 28.3
Min PZC read (of all measurements): 15.6
Max PZC average on one log: 26.8
Min PZC average on one log: 16.3
PZC Average of all logs: 21.3
Species: gluta spp.
Family: Anacardiaceae
Clade: Angiospermae
Description: Gluta spp. are trees in the Anacardiaceae family, featuring simple, alternate leaves and drupe fruits. They are notorious for their highly allergenic sap, which causes severe contact dermatitis.
Other Local Names: Gluta, Tembaga, Torotoro, Jalang, Kerbau, Thayet-thitsi, Rakban, Son
Reference Colour: Red brown
Texture: Fine
Grain: Straight to entangled
Interlocked Grain: Slight
Notes: Sapwood white to pale yellow. Heartwood dark reddish brown/deep blood red shiny marked with dark, almost black stripes, darkening on exposure, lustrous. Silica deposits. Poisonous resin exudation.
Diameter: 30÷80cm
Density @12% MC: 700kg/m³
Janka Hardness: 750lbf
Crushing Strength @12%MC: 49MPa
Static Bending Strength @12%MC: 85MPa
Longitudinal Modulus of Elasticity E: 18.5GPa
Volumetric Shrinkage Coefficient: 0.29% per %
Total Tangential Shrinkage TS: 5.3%
Total Radial Shrinkage TS: 2.9%
T/R Anisotropy Ratio: 1.8-
Fibre Saturation Point: 25%
Thermal Conductivity: 0.23W/mk
Sapwood Thickness: 10÷20cm
Sapwood Demarcation: Clearly demarcated
Resistance to Decay: Class 3 – moderately durable
Resistance to Dry Wood Borers: Class S – susceptible (risk in all the wood)
Resistance to Termites: Class M – moderately durable Atlas of Tropical Timber Species RENGAS Cross sections of Gluta sp.
Treatability: Class – 3-4 – poorly or not permeable
Use Class Covered by Natural Durability: Class 2 – inside or under cover (dampness possible)
Log Buoyancy: Floats
Log Conservation: Moderate (treatment recommended)
Drying Rate: Slow
Drying Risk of Distortion: No risk or very slight risk
Drying Risk of Case Hardening: No known specific risk
Drying Risk of Checking: Slight risk
Blunting Effect: High
Machining Tool: Tungsten carbide
Suitability for Peeling: Not recommended or without interest
Suitability for Slicing: Good
Sawing Machining Notes: Dulling effect caused by resin and silica.
Assembly Nailing Screwing: Good but pre-boring necessary
Additional Notes: Contains deposits which are allergenic
End Uses: Turned goods, Sliced veneer, Cabinetry (high-end furniture), Sculpture, Stairs (inside), Seats, Panelling, Marquetry, Flooring
Source 1: Tropical Timber Atlas, Editions Quae, e-ISBN 978-2-7592-2770-9
Pictures – each from a different individual tree:



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