In 1894, the Lumi�re Brothers introduced their Lumi�re Panchromatic plate, which was made sensitive, although very unequally, to all colors including red.
2.
Mees, a recent graduate of London University, was placed in charge of new product development, and soon introduced panchromatic plates sensitive to longer wavelengths.
3.
This technique requires three matching negatives of the subject, each made on Ilford Hypersensitive Panchromatic plates and shot through a blue, green, and red filter.
4.
Forty years later, adequately panchromatic plates and films had made excellent color reproduction possible by this method, as demonstrated by the work of Sergey Prokudin-Gorsky.
5.
New and improved sensitizing dyes were developed, and in 1902 the much more evenly color-sensitive Perchromo panchromatic plate was being sold by the German manufacturer spectrum for the red, green and blue channels of color information to all be captured with reasonable exposure times.
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