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  • jweir43 commented on JunezRiyaz's instructable How to Make PCB using Marker1 month ago
    How to Make PCB using Marker

    Ferric Chloride is nasty stuff AND it stains whatever it touches poop brown --- hands, shirts, jeans ...Much better etchant AND locally available is swimming pool muriatic acid from the home improvement store. Mix it 2 parts water to one part muriatic acid. Throw in about 5% by volume hydrogen peroxide if you want to etch faster.Alcohol is the recommended solvent for magic marker. Don't use the tequila afterwards in a margarita!!

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