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Das Hotel Belalp und die Riederfurka im Kanton Wallis, Schweiz, aufgenommen um 1900. COLORIZING PROCESS COMBINING PHOTOGRAPHY AND COLOR LITHOGRAPHY. IT IS USED FROM 1890 TO THE 1920 'S TO CREATE A COLOR PRINT FROM A BLACK AND WHITE NEGATIVE, USING BETWEEN FOUR AND FOURTEEN STONES, MADE FROM ROCKLIKE SUBSTANCES, TO COLORIZE THE PRINT WITH SEVERAL DIFFERENT INKS. (KEYSTONE/PHOTOCHROM-GESELLSCHAFT/PHOTOCHROM COLLECTION)