The ambrotype, a photographic process invented in the 1850s, took its name from the Greek for “immortal” or “imperishable.” An underdeveloped positive on coated glass, the ambrotype image assumed full ...

Many collectors of antique photographs are interested in three types of early 19th-century photography: the daguerreotype, the ambrotype and the tintype. In the early 1800s, Louis Jacques Mandé ...