Oil-based Clay
Oil-based clay, sometimes known as plasticine, is a popular material used in sculpting. Unlike water-based clay, oil-based clay does not dry out and harden, which makes it an ideal choice for sculptures that require a considerable amount of time to complete or those that need to be repeatedly altered and adjusted. It can be reused indefinitely, making it a cost-effective material for practice and drafts.
The flexibility of oil-based clay allows for fine detailing, and it can be smoothed easily, making it ideal for realistic sculptures. Moreover, it does not shrink or crack during the modeling process, which is a common problem with water-based clay.
Oil-based clays come in a variety of consistencies and hardness levels, which can be chosen based on the specific requirements of the sculpture. Some types can be quite firm, suitable for large sculptures requiring structural integrity, while others can be quite soft, suitable for smaller sculptures and fine details.
Apart from sculpting standalone pieces, oil-based clay is commonly used in the process of creating molds for bronze casting or other forms of metal sculpture. The original model is often crafted in oil-based clay, from which a mold is made. The mold is then used to cast the sculpture in metal.
While oil-based clay has many advantages, it also has a few downsides. For instance, finished pieces made from oil-based clay can't be fired in a kiln, so the completed work remains vulnerable to temperature changes and physical damage. It is also heavier than other types of clay, which may present challenges in handling and displaying larger pieces. Additionally, due to its oil content, it can leave a residue on hands and tools, requiring thorough cleaning.
Despite these challenges, oil-based clay remains a popular choice among professional sculptors and hobbyists alike due to its versatility, longevity, and ease of use.