Colls was a master printer and member of the British Linked Ring. Significantly, Colls taught the important English photographer Peter Henry Emerson (who championed Naturalistic Photography) how to print his own photogravures in the late 1880s. Colls also etched the copper plates and made hand-pulled photogravures for the important English series "Sun Artists".
Plate (Graveur) by Walter Colls
Printed by Ateliers Charles Wittmann
Included in the "Troisième Exposition d'Art Photographique" of the Photo-Club of Paris (1896)