Mt. Hood, Vintage Cyanotype Photo
Photographer unknown. Vintage cyanotype photograph, c.1905 of Mt. Hood in Oregon.
Unusually large cyanotype photo measures 5 x 7 1/2" and in overall good condition
The cyanotype process which produces the distinctive Prussian blue color was invented by Sir John Hershcel in 1842. He treated a light sensitive paper with an iron salt solution and found that by putting the paper in the sun the photo positive image would appear. Because the treated paper could be developed using only the sun, making cyanotype photographs were popular especially among amateur photographers. In the last few years, there has been a revival of interest in the cyanotype process and the blue photographs by both collectors and artists alike.