Why is a theatre screen called silver screen?

Since the advent of films in the early 1900s, theatres have been trying to optimize their viewing quality. During the 1920s, movie producers began to incorporate silver because of its reflective qualities, which delivered a better image. Eventually, the use of silver lenticular screens would fall out of fashion as alternatives became available. But because of the early prevalence of silver in the production of screens, the term “silver screen” stuck.