I was surprised how patination is both art and chemistry; managed oxidation, acids

https://fernandoylov484.overblog.fr/2026/05/why-the-toughest-architects-specify-copper-custom-elements-that-prove-themselves-over-100-years.html

I marvelled exactly how patination is both art and chemistry; regulated oxidation, acids, and waxes produce living surfaces that progress with weather condition yet stay protectively secured.