Final answer:
Adding linseed or tung oil to standard hardboard before pressing improves its stiffness, scratch resistance, and water resistance. These oils, once polymerized, create a stronger and more durable material suitable for various applications.
Step-by-step explanation:
The addition of linseed oil or tung oil to standard hardboard prior to pressing is known to improve its properties. These oils, when polymerized through the heat and pressure of the manufacturing process, create a plastic-like network within the board. This enhances the hardboard's stiffness, which is crucial for its structural integrity in various applications.
Moreover, the inclusion of these oils contributes to an increased scratch resistance and water resistance. The oils provide a more durable surface and help to repel water, thereby making the hardboard less susceptible to damage from moisture and daily wear and tear.
This treatment is part of the reason hardboard is used in environments where moisture or scratching could be problematic.
Therefore, the process of adding these oils before pressing indeed improves both the mechanical and durability qualities of standard hardboard, making it more suitable for a variety of applications.