== Example of Katedra/Zakład Fototechniki's cooperation with the industry in the 1960s ==

The letter of February 1968 from the Silesian Factory of Incandescent Lamps HELIOS [Śląska Fabryka Lamp Żarowych HELIOS] is an order to test the performance of prototype colored bulbs to be used as a photographic darkroom safelight.

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Jeudi 5 Septembre 2019

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