What does electrotype mean?
An electrotype is a duplicate printing plate created by a nineteenth-century technique that combined electricity and craftsmanship. A mould of the original page of type or an illustration was coated to make it conductive and submerged in an electrolytic bath, where a layer of copper was deposited onto its surface, reproducing every detail with remarkable fidelity. This copper shell was backed with metal alloy to form a durable plate that could be printed repeatedly, protecting the expensive original type and allowing multiple presses to run the same work simultaneously. Electrotypes were essential to mass publishing — books, magazines, and newspapers relied on them throughout the Victorian era and well into the twentieth century. The word also refers to the process itself. Though superseded by photomechanical reproduction methods, electrotyping remains a notable milestone in the history of printing technology, and surviving plates are valued artefacts in museum and library collections today.
nounAn electrotype is a printing plate made by electrodepositing a thin layer of metal (usually copper) onto a mould of a page of type, used to reproduce text and images in letterpress printing. The word also denotes the process of making such plates.
- A metal (typically copper) duplicate printing plate produced by electrolytic deposition from a wax or lead mould.
- The process or technique of producing such plates by electroforming.
"The museum's archive still holds the electrotypes used to print nineteenth-century newspapers."
"The publisher ordered fresh electrotypes so the illustrations would print with crisper detail."
"Electrotyping allowed printers to produce thousands of identical impressions without wearing out the original type."
Standard regular plural; used when referring to individual plates.
"The archive contains hundreds of electrotypes from the newspaper's early decades."
Before photoengraving took over, every illustrated book you've admired was likely printed from copper copies grown atom-by-atom in an electrified bath — the electrotype.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of electrotype
The word 'electrotype' combines 'electro-' (from Greek 'ēlektron', meaning amber, the root of 'electricity') with '-type' (from Greek 'typos', meaning a blow, mark, or impression). It arose in the early nineteenth century, when pioneers such as Moritz von Jacobi and Thomas Spencer developed the process of electroforming metal copies. Cognates sharing these roots include 'electricity', 'electrode', 'electrolysis', and 'typography'.
How electrotype is actually used
A technical term now largely historical, encountered chiefly in discussions of nineteenth- and early twentieth-century printing and publishing. Used both as a count noun (the plate) and as an uncountable noun for the process.
Easily confused with electrotype
Both are duplicate printing plates, but a stereotype is cast from molten metal in a mould, while an electrotype is built up by electrodeposition of copper, giving a sharper impression; 'stereotype' is also far more common today in its figurative sense of an oversimplified belief.