Originally posted by excentrique
Just an estimation lah.. about 100odd ++ years. Yep before the birth of gelatin film based there are several different ways which people use to capture images. There, van dyke, tintype plate, gum bichromate, platinum, blueprints etc... If not mistaken silver was first used in glassplates. The first kind of negative. Film (which means the gelatine- based we use today) was only introduced much later.