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Kaduru wood seasoning chemistry for Kolam masks: smoking rafters vs chemical kiln drying?

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M
Marta Carver•910 rep

How does traditional rafter smoking (Duma) of Strychnos nux-vomica logs prevent powderpost beetle infestations in hand-carved Ambalangoda ritual masks?

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5 Answers from travellers

✓Accepted Answer

Carving traditional Sri Lankan masks demands timber from Gith Niyanda (Kaduru / Alstonia macrophylla or Strychnos), which is light and easy to carve. However, green sap contains starches that attract wood-boring powderpost beetles (Lyctinae). Master artisans cure rough sawn logs on elevated wicker racks directly above domestic hearth kitchens (Duma) for three to six months. Wood smoke rich in formaldehyde, creosote, and pyroligneous acids penetrates the timber, while ambient warmth drops wood moisture to 10% without checking or radial drying cracks.

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P
Premadasa Mask•1820 rep

Industrial kiln drying removes moisture too rapidly, making soft Kaduru wood brittle and prone to chipping under fine chisel detail cuts.

22
M
Marta Carver•910 rep

Carvers seal the sanded mask surface with Makulu white kaolin clay mixed with glue before painting with traditional mineral pigments.

17
G
Guru Gunaya•1890 rep

Kaduru sap contains toxic alkaloids that irritate open cuts; woodworkers wear barrier balms on hands when debarking green timber.

14
L
Lukas•915 rep

Rafter-smoked Kaduru logs exhibit an amber hue and faint woodsmoke aroma that persists for decades inside completed carvings.

11
E
Evelyn Spice•930 rep

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