https://www.fujifilm.com/fr/en/business/semiconductor-materials/cleaners-and-etchants
A wide range of wet chemistries for the cleaning/drying and Etchant process.
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https://www.fishersci.com/shop/products/nital-etchant-3-nitric-acid-ethanol-reagents-4/01334665
Nital Etchant 3% Nitric Acid in Ethanol, Reagents Shop Nital Etchant 3% Nitric Acid in Ethanol, Reagents at Fishersci.com
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https://makezine.com/article/science/toner-transfer-and-muriatic-acid-etchant-making-pcbs-at-lvl1/
Brad Lyuster of Louisville's LVL1 hackerspace wrote an excellent guide to etching your own PCBs. A few months ago, the spoiled electrical engineer that I
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