n. ~ An image created using a silver halide as the light-sensitive agent and egg whites (albumen) as the binder.
Albumen photographs were introduced in the 1840s and were common by the 1850s. Albumen photographs can be on a glass base and were widely used to create lantern slides. Albumen photographic prints (a paper base) were the predominant print process through the 1890s when gelatin silver processes were introduced. Albumen photographs are monochromatic, but may be hand-colored.