powderless etching

printing

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July 1, 2026

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Powderless etching is a printing technique that allows for the direct chemical removal of metal from non-image areas of a plate. Unlike traditional etching, which can cause sideways etching and weaken fine lines, powderless etching prevents lateral removal of metal. This is achieved by adding oily materials and wetting agents to the etching bath, or by using organic compounds that create an acid-resistant coating. This method was a significant advancement, particularly for etching zinc and magnesium plates, and later copper, leading to more precise and durable printing plates.12

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Chemical etching—traditional and powderless processes
…introduction of a process of etching a magnesium plate without the use of powder. Experimenters found that by adding an oily material and a surfactant (wetting agent) to the nitric acid bath and controlling the conditions under which the plate was etched, they could produce characters in relief with adequate…
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…introduction of a process of etching a magnesium plate without the use of powder. Experimenters found that by adding an oily material and a surfactant (wetting agent) to the nitric acid bath and controlling the conditions under which the plate was etched, they could produce characters in relief with adequate…
Read More