Developer compositions for high contrast diffusion transfer phot

Developing solutions for 2-component diazo-type materials

Development of light-sensitive quinone diazide compositions

Device for air cleaning

Device for cleaning electrodes in an electrostatic precipitator

Device in an electrostatic precipitator for the suspending, cont

Diazo light-sensitive copying composition and process of using i

Diazo recording process and material

Diazo-type multicolor reproduction process

Diazotype material and graphic reproduction processes employing

Diazotype material that can be developed by applying a small amo

Diazotype multicolor reproduction process

Diffusible-dye releasing type dyes which couple to form colorles

Diffusion transfer color photographic flim unit with composite o

Diffusion transfer color process using lactone or sultone ring c

Diffusion transfer image-receiving element having polyvinylpyrid

Diffusion transfer integral film units with flare reducing layer

Diffusion transfer process using silver halide emulsions with 90

Diffusion transfer processing solutions with carboxymethyl hydr

Direct-positive double exposure process utilizing a primitive, u