A very thin sheet of wood which is cut from the round logs with 0.5 to 5 mm thickness is called:
From Log to Layer: How Wood is Processed
Different wood products are created by processing logs in various ways. Some methods involve cutting the log into solid pieces, while others break it down into smaller components like particles or fibres. The question describes a specific product made by peeling a thin, continuous sheet from a log.
📝 Detailed Analysis of the Options
(b) Chipboard
Chipboard, also known as particleboard, is made from wood chips, shavings, and sawdust that are bonded together with resin under heat and pressure. It is made from particles, not a solid sheet.
(c) Fibre wood
Fibreboard (like MDF) is made by breaking down wood into its basic fibres, mixing them with wax and resin, and forming panels by applying high temperature and pressure. It is made from fibres, not a solid sheet.
(d) Blockboard
Blockboard consists of a core made of solid wood strips (blocks) placed edge-to-edge and sandwiched between layers of veneer. While it uses veneers, the board itself is not a single thin sheet.
(a) Veneer
This is the correct answer. A veneer is a very thin sheet of wood, typically ranging from 0.5 mm to 5 mm in thickness (as per IS 303, standard thicknesses are often 0.6mm to 1.0mm). It is produced by peeling a rotating log with a long knife or by slicing a block of wood. These thin sheets are the fundamental building blocks for plywood and are also used to give a high-quality wood finish to lower-grade materials.
📊 Comparison of Wood-Based Boards
| Product | Core Component | Manufacturing Method |
|---|---|---|
| Veneer | A thin, solid sheet of wood | Peeling or slicing from a log |
| Chipboard | Wood particles/chips | Pressing particles with resin |
| Fibreboard | Wood fibres | Pressing fibres with resin |
| Blockboard | Solid wood strips (blocks) | Sandwiching a core between veneers |
💡 Study Tips
- Veneer = Thin Sheet: This is the most important association. Veneer is a paper-thin layer of real wood.
- Veneer is an Ingredient: Think of veneers as the primary ingredient used to create other products like plywood or to cover less attractive boards.
- Know the Core: Differentiate boards by their core material: Veneer (thin sheet), Chipboard (particles), Fibreboard (fibres), Blockboard (solid strips).