This is a soft, lightweight metal. It is dull silver in colour as a result of oxidisation (the way it reacts with the oxygen in the atmosphere).
As it is already oxidised, aluminium is not vulnerable to further reactions, such as rusting.
Aluminium is both lightweight and durable, making it ideal for tools.
This element is abundant in the earth but difficult to extract. It is, however easily recycled, which makes recycling an important source of the element. It is also much cheaper to recycle than extract.
Anodising
The aluminium used to make a darby is often anodised. This is a process which increases the tool’s resistance to corrosion and wear.
Anodising is a process which thickens the oxide layer of the aluminium by passing an electrical current through a solution in which the aluminium is placed.
Handles
Darby handles are generally made from wood. This is because it is cheap and easy to shape, and also provides a comfortable grip.
Wooden darby
The darby used to be made from wood, and some examples of this can still be seen. However, they are difficult to find for purchase, as the aluminium variety is favoured by manufacturers. An aluminium darby will last longer than a wooden one, which can wear down and loose evenness.
Plastic darby
Alternatively there is a version of the darby made from polyurethane foam. This is extra lightweight but inflexible, making it easy to manoeuvre.