Science: Photography

Photography is facing a new development almost as far-reaching as the change from tintypes to cellulose film. In the 103 years since Louis Jacques Daguerre invented the daguerreotype the use of light-sensitive silver salts has been the basis of photography. Now silver is being replaced by coal-tar dyes. So far this new dye-treated film has been used only to make duplicates of sound tracks from regular film. But scientists believe that dye-treated film for direct photography is in sight.

In ordinary photography silver bromide, emulsified in gelatin, is spread on a transparent cellulose-acetate...

Want the full story?

Subscribe Now


Get TIME the way you want it

  • One Week Digital Pass — $4.99
  • Monthly Pay-As-You-Go DIGITAL ACCESS$2.99
  • One Year ALL ACCESSJust $30!   Best Deal!
    Print Magazine + Digital Edition + Subscriber-only Content on

Learn more about the benefits of being a TIME subscriber

If you are already a subscriber sign up — registration is free!