Tutorial submitted by:  Esprit Mystique : Blog

Ferric nitrate provides a clean etch on sterling silver and fine silver.

You can buy ferric nitrate crystals at most chemical supply stores. I buy from Adchemco Scientific in Tucson, Arizona. ($60 for 5 pounds of crystals. Smaller quantities available for less $$$).  Read More

My Unscientific Etching Process:

Fill a quart size (glass or plastic) measuring pitcher with 2 cups of tap water. Slowly add enough ferric nitrate crystals (about 2 cups) to make a total solution of 1 quart. Mix carefully with a wooden or plastic spoon (do not use anything metal) until the crystals are dissolved. The solution will turn a dark greenish color that is fairly clear compared to the thick, opaque, greenish ferric chloride, which is used straight out of the bottle. (I feel like I should be chanting a “Spell” while stirring, as it reminds me of a Witch’s brew. : )  Read More

CAUTION: Don’t be blasé about it. I learned the hard way. Below is a photo of a nice, thick piece of silver I was etching for a bracelet. I got involved in another project and lost track of time. It was in the etch bath for 6 hours and the ferric nitrate etched holes all the way through the silver in some spots. I was miffed at my neglect (and material loss), but it was a valuable lesson. I was pleased to see that the dry toner resist held up very well the whole time. The red Staedler border ink mask did break down somewhat.  I should have taped it, but I didn’t think it would be etching for 6 hours!

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