Defender Photo Supply was an early leader in manufacturing of black & white sheet film, plates, printing paper, and instructional books. Incorporated in 1899 in

Rochester, New York Rochester () is a city in the U.S. state of New York, the seat of Monroe County, and the fourth-most populous in the state after New York City, Buffalo, and Yonkers, with a population of 211,328 at the 2020 United States census. Located in W ...

, it was purchased by DuPont in 1945.Walker, P. "Du Pont." ''The Focal encyclopedia of photography,'' 3rd ed. (1993), p. 231. A branch of the company, The Defender Dry Plate Company, was located in Wayne Junction, Germantown, Philadelphia, PA. The two company branches issued combined trade catalogs.

Achievements

*''Defendol'' - an affordable developing agent created to sidestep developers controlled by

German German(s) may refer to: * Germany (of or related to) ** Germania (historical use) * Germans, citizens of Germany, people of German ancestry, or native speakers of the German language ** For citizens of Germany, see also German nationality law **Ge ...

patents *''Chromatone Process'' - Introduced in 1935, is a method of using a collodion stripping paper manufactured by the Defender Company andm tricolor toners developed by Francis H. Snyder and Henry W. Rimbach of

New York City New York, often called New York City or NYC, is the most populous city in the United States. With a 2020 population of 8,804,190 distributed over , New York City is also the most densely populated major city in the Un ...

. *'' VC Paper''

References

Photography companies of the United States Defunct companies based in New York (state) {{photography-stub