How to make a trowel

To start the manufacturing process, a sheet of metal is cut into the correct size and shape with a high pressure jet of water. 

 The blade is then placed into a furnace until it is red hot. If it is placed into a coal-burning furnace the coal will leave a carbon coating on the outside, which makes it stronger.

 When the blade has been taken out of the furnace it is placed under an industrial hammer. This will pound the blade into the correct shape.

A blacksmith then uses a small hammer to work out any dents in the blade. It is then placed back into the furnace for more hardening. The…