Crystoleum Painting by Ullman MFG Co New York 1899Lovely antique crystoleum print titled hide and seek made by Ullman Manufacturing Company of New York in 1899. Measures 26cm x 21cm. The glass plate is mounted within a wooden gilt frame and is excellent condition. A crystoleum is a photographic technique that was popular from around 1880 to 1910. The term comes from crystal and oleum (oil). Heres a brief overview of the process: Albumen Print: The process starts with an albumen print, which is pasted