The image made from zinc etching captures the famous calaveras or skull / skeleton image that had become popular at the turn of the 20th century.
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In the case of line cuts ( graphics in solid blacks and whites without gradations of gray or color ), the photoengraving is done on zinc, and the result is called a zinc etching.
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His complete work consists of dry-point, vernis mou, aquarelle, oil, wood etching, zinc etching, lithographs, lithograph on zinc, printing fabric, photogravure, monotypes and custom prints for Ex Libris, books, magazines, stamps, greeting cards etc.