Acrylic colors for patina

For the "patina with acrylic paints"

 As I said in the video, there is a rule in oxidization - I learned this long time ago, in the Fine Arts school in the "antique restoring" class. When it comes to copper and copper alloys:

1. Copper by itself oxidizes blue. Various shades, can go from a turquoise blue to even an almost white blue. The older it is, it might either veer to green, or to grey, then towards black

2. In combination with other metals, like bronze (copper+zinc) or brass (copper with tin) the oxidization will veer more either towards green or towards grey. It all depends on the amount of copper in the alloy, essentially, the more copper, the more blue, the less copper, the more greenish or greyish.

3. The more aged a metal object is, no matter of the composition, the patina in time will get greener, and veer towards a darker green - going even towards black - for objects that are hundreds of years old. That is why it's called "verdigris", essentially Latin root words meaning "green-gray"

Examples:

How new-ish copper patina would look

older copper

even older copper

Sumerian copper coins - the patina is greyish with faint hues of blue or green but veers towards dark grey and black

newer bronze with greenish/bluish patina (more copper in the alloy)

newer bronze with greyish patina (more zinc in the alloy)

we see this all the time - brass with green oxidization

ancient Roman brass coin - patina veering to grey

compare to ancient Sumerian bronze coin

and ancient Roman bronze coins

Now, here's what you can get, a short reference chart


For the most commonly found acrylic paints, Americana

Reference the chart that can be found here:

https://decoart.com/colorchart/

Click on the "color chart" of Americana Acrylics

For the oxidized part (blues and greens)

Silver Sage Green
Mint Julep Green
Teal Mint
Sea Aqua
Aqua Sky
Laguna Blue
Indian Turquoise
Turquoise Blue

For the metal dull part

Oxblood
Deep Blush
Antique Rose
Heritage Brick

For the metal (shiny) part

Click again on that link, scroll down to "Dazzling metallics" and open that color chart

Copper
Worn Penny
Bronze
Rich Espresso
Venitian Gold.
For silver - dark patina, zinc