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: 7
Number of individual trees analyzed: 7
Number of specimens: 15
Number of measurements: 48
Max PZC read (of all measurements): 21.6
Min PZC read (of all measurements): 9.7
Max PZC average on one log: 20.8
Min PZC average on one log: 10.4
PZC Average of all logs: 16.5

Species: pterocarpus indicus
Family: Fabaceae
Clade: Angiospermae
Description: Pterocarpus indicus, commonly known as Narra, is a medium to large deciduous tree with a broad crown of glossy, pinnate leaves. It produces abundant clusters of fragrant, bright yellow, pea-like flowers, followed by distinctive flat, disc-shaped, winged pods. Valued for its durable, reddish-brown timber, it is also widely planted as an ornamental and shade tree.
Other Local Names: Andaman Padauk, Honne, Venga, Vengai, Amboina, Angsana, Linggua, Sonokembang, Sena, Pashu-Padauk, Rosewood, Manila-Padouk, Narra, Vitali

Reference Colour: Light red
Texture: Coarse
Grain: Straight or interlocked
Interlocked Grain: Marked
Notes: Sapwood straw yellow. Heartwood deep blood-red with almost black markings, alternatively honey coloured with reddish black markings, darkening to dark brown, lustrous. Rose scent.

Diameter: 50÷100cm
Density @12% MC: 700kg/m³
Janka Hardness: 1230lbf
Crushing Strength @12%MC: 51MPa
Static Bending Strength @12%MC: 82MPa
Longitudinal Modulus of Elasticity E: 16.6GPa
Volumetric Shrinkage Coefficient: 0.32% per %
Total Tangential Shrinkage TS: 4%
Total Radial Shrinkage TS: 2.8%
T/R Anisotropy Ratio: 1.4-
Fibre Saturation Point: 20%
Thermal Conductivity: 0.23W/mk
Sapwood Thickness: 2÷5cm
Sapwood Demarcation: Clearly demarcated

Resistance to Decay: Class 1 – very durable
Resistance to Dry Wood Borers: Class D – durable (sapwood demarcated, risk limited to sapwood)
Resistance to Termites: Class D – durable
Treatability: Class – 3-4 – poorly or not permeable Atlas of Tropical Timber Species PADAUK
Use Class Covered by Natural Durability: Class 4 – in ground or fresh water contact
Durability Notes: This species naturally covers the use class 5 (end uses submerged in salt water, sea water or brackish water) due to its pronounced hardness. However this characteristic is of little interest for this precious species. 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: Floats
Log Conservation: Good
Drying Rate: Normal to slow
Drying Risk of Distortion: No risk or very slight risk
Drying Risk of Case Hardening: No known specific risk
Drying Risk of Checking: No risk or very slight risk

Blunting Effect: Fairly high
Machining Tool: Tungsten carbide
Suitability for Peeling: Good
Suitability for Slicing: Good
Sawing Machining Notes: Blunting effect quite important due to latex and resin deposits.
Assembly Nailing Screwing: Good but pre-boring necessary
Additional Notes: Burrs with dark marking and wavy parenchyma, structure are particularly decorative and appreciated for, cabinet works
End Uses: Turned goods, Coffins, Shipbuilding, Cabinetry (high-end furniture), Stairs (inside), Veneer for back or face of plywood, Musical instruments, Veneer for interior of plywood, Panelling, Flooring, Sliced veneer, Decking, Exterior panelling

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