History of Printing. Collotype and Photolithography
The quest for absolute fidelity. (Late 19th Century)
The rise of photochemistry effectively took the human hand out of the reproduction process. Before this shift, scaling or duplicating graphics required a master engraver to manually etch the original onto a printing plate—a bottleneck that made subtle distortions inevitable. These new chemical processes, however, allowed printers to bypass the middleman and transfer physical reality directly onto the plate with absolute precision.
In 1868, Joseph Albert1 perfected the collotype process. By coating a glass plate with light-sensitive gelatin and exposing it to light through a negative, he found that the surface would harden in exact proportion to the exposure. It was a revolutionary, continuous-tone planographic method: halftones were captured not by a rigid grid of dots, but through the microscopic reticulation of the gelatin as it dried, creating a beautiful, organic grain. While it delivered facsimile-quality reproductions, the delicate nature of the gelatin meant that print runs remained strictly limited.
Then came Frederic Ives2, who in 1878 invented photolithography, paving the way for industrial-scale production. This technique paired a photographic negative with metal or stone plates treated with a light-sensitive, oil-retaining layer. Trading fragile gelatin for a rugged base solved the durability problem. Once washed, the exposed areas kept their oil-friendly properties and held onto the ink, allowing high-quality graphics to be cranked out in massive numbers at high speeds.
Ultimately, photolithography laid the groundwork for modern offset printing. This selective chemical wetting of the plate became the backbone of commercial publishing, while the core logic of exposing materials through structural masks would later evolve into the photolithography used to etch silicon chips in microelectronics.
Josef Albert was a German photographer and inventor who first gained prominence for his precise reproductions of hand drawings and copper engravings. However, his development of the practical phototype (collotype) process became his definitive legacy, forever changing the history of high-fidelity printing.
Frederic Ives was an American inventor and photography pioneer who developed the first commercially successful halftone printing process. He also made significant contributions to the fields of color and stereoscopic photography, as well as colorimetry—the science of color measurement and quantification used in chemical analysis. → Read more on Wikipedia