Weekly Vocabulary

Ambrotype: a positive image created on a sheet of glass. The glass is dipped in silver nitrate and then exposed to the image, creating a negative image, which appears as a positive when reflected by light.

Tintype:  a positive image that is created on a thin sheet of iron, which is dipped in dark lacquer or  enamel.

Heliography: Using Bitumen of Judea, a photograph can be created by covering a piece of glass or metal. It hardens from sun exposure, creating harder spots. These spots then appear on the image when oil of lavender is spread on the image.

Daguerreotype: the first publicly announced photograph, which uses exposed light and halogen fumes to a silver metal plate, to create a negative. It can later be developed in a dark room.