Kodak D-76 Question.

Does anyone know when Kodak D-76 was first introduced?
Some of the information I have searched says 1926 and other sources say 1927.
So when is the actual centenary of D-76?

The answer is it came from Capstaff's 1926 research, and was first published in 1927.

Ian

Ian Grant said:

The answer is it came from Capstaff's 1926 research, and was first published in 1927.

Ian

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Is this younger or older than Agfa Rodinal?

Rodinal is much older Paramidophenol was patented in 1891.



Rodinal is the second concentrated solution.

Ian

Many developments back then.

D76 and Rodinal have one thing in common, both were made by other manufacturers.

In modern terminology we'd call D76 "Open Source". In the late 1920s the Cine industry needed a standard, replenishable, developer, so Kodak made the formula public. It was manufacture by many other companies around the world, Ilford ID-11, Defender 6, Foma FV3, Forte FD20, Foton N12, May & Baker 320, also Agfa 19 but this had a little Bromide in the developer as a starter.

Rodinal clones were made by ilford - Certinal (1907-1960s), Johnsons -Azol, even Kodak Ltd Kondinol, never sold or made in the US.

Kodinol came from G.E.K. Mees work in 1909 when he was at Wratten & Wainwright. Somewhere I have a paper he wrote at the time.

Ian

Keith Tapscott. said:

Does anyone know when Kodak D-76 was first introduced?
Some of the information I have searched says 1926 and other sources say 1927.
So when is the actual centenary of D-76?

Click to expand...

Thanks Ian.
I noticed on your website that the formula for Agfa 19R replenisher is less concentrated than the D-76R/ID11R replenisher.