Patent of the week- Photographic processing method and apparatus
Photographic processing or photographic development is the chemical means by which photographic film or paper is treated after photographic exposure to produce a negative or positive image. Photographic processing transforms the latent image into a visible image, makes this permanent and renders it insensitive to light.
The invention relates to a photographic processing method with aqueous processing baths which are regenerated during processing. It is characterized under replenishment processes or compositions, i.e. addition of useful photographic processing agents.
Since almost all photographic chemicals normally used are solid and use of solids is due to occur when handling chemicals, the dust load is not desirable. The photochemical industry for years, sometimes at great expense used liquid concentrates from which the re-generators are mixed which earlier carried the approach of the re-generators of powdered chemicals. The object of the invention to avoid the problems associated with liquid re-generators without dust problems to exchange it.
The improvement had overcame disadvantages of the existing photographic technology as such made the photography process easier. For such an invention Ubbo Dr. Wernicke, Werner Dipl.-Ing and Went got patent protection with the Patent Number EP0524414B1 on 5th February, 1997.