Why does one need to be extra cautious while ironing synthetic fibres?

Options

A. They expand on heating
B. They melt very easily
C. They wrinkle easily
D. They get hardened

Explanation

**Step-by-Step Solution:**

1. **Understanding Synthetic Fibres**: Synthetic fibres are man-made materials created through chemical processes, often derived from petrochemicals. Common examples include polyester, nylon, and acrylic.

2. **Properties of Synthetic Fibres**: One of the key properties of synthetic fibres is that they are highly flammable. This means they can catch fire easily when exposed to a flame or high heat.

3. **Low Melting Point**: Another important characteristic of synthetic fibres is that they generally have a low melting point compared to natural fibres like cotton or wool. This means that when exposed to high temperatures, synthetic fibres can melt or deform.

4. **Ironing Process**: Ironing involves applying heat to remove wrinkles from fabric. If the temperature of the iron is too high, it can cause synthetic fibres to melt or become damaged.

5. **Caution Required**: Due to their flammability and low melting point, it is essential to be extra cautious while ironing synthetic fibres. Using a lower temperature setting on the iron and keeping the iron moving can help prevent damage.

6. **Conclusion**: Therefore, one must be careful while ironing synthetic fibres to avoid melting the fabric or causing it to catch fire.

---