Originally Posted by Prof_Pixel
The orthochromatic (non-red sensitive) version of Verichrome was available from 1931 to 1956. The panchromatic version (Verichrome Pan) came out in 1956.
You're only out by nearly 50 years
Verichrome was introduced in 1907 or 8 as a result of research into Panchromatic emulsions by Mees & Sheppard.
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