What material is used for the print in the calotype process?

The calotype process, developed by William Henry Fox Talbot in the 1830s, utilizes paper as the primary material for creating photographs. Specifically, the paper is coated with a light-sensitive emulsion containing silver iodide. This coating allows the paper to react to light, capturing images when exposed and then developed. The process produces a negative image on the paper, from which multiple positive prints can be made. The use of paper in this method marked a significant development in photography, distinguishing it from earlier techniques that relied on metal or glass plates. The other materials mentioned—metal plates, glass plates, and plastic film—are associated with different photographic processes rather than the calotype. These alternatives do not apply to the calotype, which is specifically known for its use of treated paper.