For the health risks involved with muriatic I prefer to use the pcb etchant. I have found that lots of folks are having troubles finding it at Radio Shack. If they tell you they are out,,look at all the top shelves and all over the store. The last two bottles I bought they did not know they had. For a mix of water and acid follow the golden rule AAA,, always add acid. There can be a reaction if you add water to acid. With Acid work outdoors and watch the wind keep wind at your back. If you use a container other than the one it came in mark it clearly as to what is in it. Such as two parts muriatic pool acid and one part water. Hope all works well for you.
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