Acrylonitrile Butadiene Styrene (ABS)

ABS plastic ground down to an average diameter of less than 1 micrometer is used as the colorant in some tattoo inks.[citation needed] Tattoo inks that use ABS are extremely vivid. This vividness is the most obvious indicator that the ink contains ABS, as tattoo inks rarely list their ingredients.
ABS is also commonly used in rapid prototyping extrusion-based 3D printers. Its glass transition temperature makes it a material of choice for rapid prototyping — relatively high as to reduce unwanted deformation at slightly elevated temperatures but low enough to be safely attainable with standard extrusion setups.