The short answer is that it depends.
Some people use the weaker 10% Nitol and others use closer to 30% Nitol (I am pretty sure based on fuming 63-67% Nitric acid), and some use everything in between based on the actual meteorite being etched. I use the 63-67% Nitric acid and mix it with 99.9% methanol (acid into methanol slowly). The acid you are considering is just diluted with water and depending on what you are etching, should be fine. I would just increase the acid into the alcohol and use a 90%+ alcohol. My view is that etching is far more art than science and requires much experimentation to get "right". Hope this helps. Best, Mendy Ouzillou From: Meteorite-list [mailto:[email protected]] On Behalf Of bobadebt--- via Meteorite-list Sent: Wednesday, October 11, 2017 9:06 AM To: [email protected] Subject: [meteorite-list] Nitol Etching Formula I looked but can seem to find this specific info so I hope someone on here can help. I know the basic formula for Nitol etching solution is 90% alcohol and 10% nitric acid. BUT what are the strengths is this formula based on? For instance, you can readily buy 70% and 90% alcohol at any store and nitric acid comes in a huge variety of strengths but 63% seems to be the most common. The reason I ask is that I have an acquaintance that has 1/2 gallon of 50% strength nitric acid that he would love to give to me but because he can not easily dispose of it BUT I need to determine the correct ratio before I accept his gift because I am pretty sure the nitol formula uses stronger acid I hope this makes sense. Thanks
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