![]() ![]() ![]() Frog green results after several applications, 1/2 hour intervals. For Yellow Green, dip in dilute nitric acid, then wash and dry.Ī cold process, opaque patina. Wash solution over metal surface, let dry, then wash piece in cool water. Solution hot (180 to 190☏), metal hot (200☏), cold wash water applied after metal has cooled to around 100☏. Heat metal and apply a fresh mixture for each coloring. When finished, wax over the patina to darken and set the color. You may want to use a slightly damp paper.īurnish the surface with steel wool or wire brushes. When a light brown rust color appears rinse well with cool water.ĭry with newspaper - it is very important to use newspaper. This old Italian formula produces a rich brown patina.Īpply evenly with a brush, sponge, or sprayer and let it dry. Sulfurated Potash - grape sized lump (crushed).(Red to reddish brown has also been reported using this recipe.) So if the formula says to use 1/2 teaspoonful, by all means use a measuring scoop that reads either 2.5ml or 1/2 teaspoonful, but if it says to use 8oz, please do not use a 1 cup measuring spoon. You'll get a better patina and be happier with the result. Measuring by weight is much more accurate than by volume. Please, when using any powder, WEIGH the powder using a scale if the instructions read as a weight. So if a formula says 1/4 oz you need to weigh out 7.1gm of something. I have done so and provided a few notes to make them a bit easier to understand.įor people that aren't used to pints, tsp, tbsp etc.ġ pint = 473ml (roughly 16oz) "A pint is a pound, the world around!"ġ grain is approximately 30mg, so 33 grains is roughly 1 gram ![]() Triw posted a link to a website with a BUNCH of patina formulas that I feel deserves to be posted here as well. But then they don't tell you HOW to use that chemical in order to get the desired results. Often times you'll see someone mention "you can use BLAH BLAH BLAH and it will give you a green patina". I know there are many many posts on different copper patina's. ![]()
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