IS 2338:2000 (Part 2) is the Indian Standard (BIS) for finishing wood and wood-based materials, part 2: schedules. This standard outlines the recommended schedules for applying opaque and transparent finishes (paints, varnishes, polishes) to wood and wood-based materials. It specifies the sequence, number, and types of coats required for various exterior and interior applications to ensure durability and aesthetic quality.
Code of practice for finishing wood and wood-based materials, Part 2: Schedules
| Parameter | IS Value | International | Source |
|---|---|---|---|
| Adhesion Testing | Qualitative visual inspection for peeling or flaking. | Passes cross-hatch adhesion test per ASTM D3359 with a minimum rating of 4B. | AWI 300 |
| Sheen Level Specification | Descriptive terms like 'matt', 'egg-shell', or 'full gloss'. | Quantitative ranges measured with a gloss meter (e.g., Matte: 0-10 GU; Satin: 20-35 GU at 60 degrees). | AWI 300 |
| Dry Film Thickness (DFT) | Not specified; defined by number of coats (e.g., 'three or more coats of varnish'). | Specific minimum DFT is required (e.g., 1.0 mil / 25 microns for transparent systems). | AWI 300 |
| Sanding Procedure | Final sanding with 'No. 0 or 00' sandpaper (approx. P220-P280). | Typically specifies a maximum grit to ensure stain/finish penetration (e.g., not to exceed P180 for many systems). | AWI 300 |
| Knot Treatment | Application of 'two coats of knotting varnish'. | Application of a dedicated shellac-based or stain-blocking primer over knots and resinous areas. | BS 6150:2019 |
| Moisture Content of Wood | Implied to be in a 'dry condition'. | Specifies a maximum moisture content range before finishing (e.g., 6-12% depending on region and use). | AS/NZS 2311:2017 |