A goldsmith blows air into the kerosene lamp flame with a blow pipe so that complete combustion of fuel takes place and the temperature of the flame increases. The goldsmith requires a hotter flame to make jewellery. Otherwise the goldsmith blows the outermost, hotter zone of the flame on the jewellery.

Reasons why a goldsmith blows air into the kerosene lamp flame:




To increase the temperature:
- When a goldsmith blows air into the kerosene lamp flame using a blow-pipe, it increases the supply of oxygen to the flame. This, in turn, helps in increasing the temperature of the flame significantly.
- The increase in temperature is crucial for the goldsmith as it allows them to melt metals such as gold, silver, or copper, which have high melting points.

To ensure complete combustion:
- Blowing air into the kerosene lamp flame helps in ensuring complete combustion of the fuel. This is essential for the goldsmith as incomplete combustion can produce soot and smoke, which can contaminate the metal being worked on.
- Complete combustion also results in a cleaner and more efficient flame, which is necessary for precision work like jewelry making.

To control the size and shape of the flame:
- By blowing air into the flame, the goldsmith can control the size and shape of the flame. This level of control is crucial when working on intricate designs or delicate pieces of jewelry.
- Adjusting the flame size and shape allows the goldsmith to focus the heat precisely where it is needed, ensuring that the metal is heated evenly and consistently.

To speed up the metalworking process:
- Blowing air into the kerosene lamp flame accelerates the metalworking process by increasing the rate at which the metal can be melted, shaped, or soldered.
- This is particularly beneficial for the goldsmith as it helps in saving time and increasing productivity, especially when working on multiple pieces of jewelry or intricate designs.

In conclusion, blowing air into the kerosene lamp flame with a blow-pipe is a crucial technique used by goldsmiths to control the flame, increase the temperature, ensure complete combustion, and speed up the metalworking process.

A goldsmith blows air into the kerosene lamp flame with a blow pipe so that complete combustion of fuel takes place and the temperature of the flame increases.
Otherwise the goldsmith blows the outermost, hotter zone of the flame on the jewellery.