What are the primary methods for preserving bamboo mentioned in the code?

The main methods are steeping, diffusion process, hot and cold process, and pressure impregnation (Clause 6).

What is a common non-toxic preservative recommended for indoor use?

A solution of Boric Acid and Borax is recommended for items not exposed to weather or ground contact (Table 1).

Is it necessary to dry bamboo before treatment?

Yes, the code specifies that bamboo should be well seasoned (air-dried or kiln-dried) to a moisture content of around 15-20% before treatment for best results (Clause 4.1).

What concentration of CCA preservative is typically used?

The concentration varies by treatment method, ranging from 2.5% for brushing/spraying to 6% for pressure treatment (Table 1).

IS 1902

: 2006

Preservation of bamboo and cane for non-structural purposes - Code of practice

CurrentSpecializedCode of PracticeMaterials Science · Timber and Timber Stores

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This code of practice outlines methods for the chemical preservation of bamboo and cane used for non-structural purposes like furniture, handicrafts, and fencing. It details the preparation of materials, types of preservatives, various treatment processes such as steeping and pressure impregnation, and essential safety precautions.

Preservation of bamboo and cane for non-structural purposes - Code of practice

Quick Reference Values

CCA (Copper-Chrome-Arsenic) solution concentration2.5 to 6 percent by mass

Boric Acid-Borax (1:1.5) solution strength8 percent by mass

Minimum steeping duration1 to 4 weeks depending on species

Hot bath temperature in Hot & Cold process85 to 90 °C

Hot bath duration in Hot & Cold processMinimum 2 hours

Practical Notes

Thorough seasoning (drying) of bamboo before treatment is essential for effective preservative penetration and to minimize post-treatment cracking.

For better preservative absorption, the waxy outer skin (epidermis) of the bamboo culm should be scraped off or nodes should be punctured before treatment.

CCA treated material should not be used in contact with food, drinking water, or for making toys due to its toxicity.