It is a black pigment that is derived from the incomplete combustion of carbon-based materials, such as coal or oil. In cosmetics, carbon black is primarily used as a colourant to provide a deep black shade to various products like eyeliners, mascaras, and eyeshadows. It is also used in foundations and powders to enhance their colour and create a more even complexion. Additionally, carbon black can act as an absorbent, helping to control oil and shine on the skin. It's fine particles allow for smooth application and blendability, making it a popular choice in the cosmetic industry.

Advantages:
Firstly, it is a highly pigmented substance that provides intense colour payoff, making it ideal for creating bold and dramatic makeup looks. Additionally, carbon black has excellent staying power, ensuring that the colour stays vibrant and long-lasting throughout the day. Moreover, it is a versatile ingredient that can be used in various cosmetic products such as eyeliners, mascaras, and eyeshadows, allowing for a wide range of creative possibilities. Lastly, carbon black is known for its ability to absorb light, which helps to reduce shine and create a matte finish in cosmetic formulations.

Disadvantages:
It can cause skin irritation and allergic reactions in some individuals, especially those with sensitive skin. This can lead to redness, itching, and discomfort. Secondly, carbon black is a known potential carcinogen, meaning it has the potential to cause cancer. Although the concentration of carbon black in cosmetics is typically low, long-term exposure to this ingredient may pose health risks.

Conclusion:
It can be concluded that the utilisation of carbon black in cosmetics has several noteworthy implications. Firstly, carbon black serves as a pigment in cosmetic products, providing a deep and intense black colour that is highly sought after in various makeup applications. Additionally, it offers excellent stability and resistance to fading, ensuring that the desired colour remains intact for extended periods. Moreover, carbon black possesses exceptional light-absorbing properties, which can help to minimise the appearance of imperfections and create a more even skin tone. However, it is crucial to consider potential health concerns associated with carbon black, such as its potential to cause skin irritation or allergic reactions in some individuals.

References:
https://www.sciencedirect.com/topics/chemistry/carbon-black#:~:text=Carbon%20black%20is%20mainly%20produced,9%2C24%2C25%5D.
https://www.britannica.com/science/carbon-black