Many elements are green in a flame test: B, Tl, Te, Sb, Cu(II) (copper not in a halide).
The chemical equation for the flame test for borax is: Na2B4O7·10H2O (borax) + heat → Na2O (sodium oxide) + B2O3 (boron trioxide) + H2O (water) + light emissions (color changes in flame)
The flame test for nickel produces a blue-green color flame.
Zippo does not sell a lighter that has a green flame. In order to achieve a green flame, you'd have to use chemicals such as Copper Sulfate or Boric Acid dissolved in methanol. You would take the Chemical and Methanol solution and add it to your lighter fluid. Another option is to have a piece of copper such as a wire suspended in your flame. It is best to sand the piece of copper.
The green flame is likely due to the presence of copper in the ink used in the magazines. When copper is heated, it can produce a green flame.
The flame color of CuCl2 is blue-green. This color is often observed when copper compounds are heated in a flame.
When phosphorus burns, it produces a pale green flame.
Boron is the element that gives a green flame when it is heated.
Chlorine gas itself does not emit a colored flame when subjected to a flame test. Instead, it will impart a green color to the flame when a sample containing chlorine (such as a chloride compound) is included in the flame test.
Cupric nitrate typically produces a blue-green flame when burned.
The flame color of boron in the flame test is bright green.
Copper gives off a green flame when burned. So, green.
A green flame is due probable to copper.