Investigation of the Effect of Over-Etching During Color Etching

Renkó, József Bálint and Szabó, Péter János (2022) Investigation of the Effect of Over-Etching During Color Etching. ACTA MATERIALIA TRANSYLVANICA (EN), 5 (1). pp. 29-34. ISSN 2601-8799

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Abstract

During color etching, the examined grain structure undergoes a continuous, cyclic color change. This phenomenon is accompanied by a continuous loss of light intensity reflected from the surface. If the etching process is not stopped in time, the surface will be over etched. As a result, the separability of the individual grains will be greatly damaged, which can lead to a significant loss of information. It was investigated how to determine the moment of over-etching for each grain. During the in-situ observation of the etching, the time at which a particle can be considered over etched was determined by measuring the luminance normalized to the initial state.

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