The Basis of the Kalvar System of Photography^*

* First publihed in the Proceedings of the National Microfilm Association.

Abstract

In the Kalvar process image formation is accomplished by light scattering rather than by light absorption. A compound which will undergo photolysis to yield volatile products is dispersed in a polymeric vehicle which can be relaxed by heat. Upon exposure to light,internal pressures are produced within the vehicle resulting in a “latent image” of internal stresses. Upon subsequent exposure to heat, reorientation and an ordered recrystallization of the polymer result from the force of these internal pressures. Thereoriented and recrystallized portions of the polymer scatter light strongly to produce the developed photographic image.

Notes

* First publihed in the Proceedings of the National Microfilm Association.