ScienceWithAD on Instagram: "Why China Records Marriage on Heated Copper Sheets! What you’re seeing here is how a simple copper sheet is turned into one of the most meaningful objects in a Chinese household. The process begins by heating the copper over fire, which softens the metal so it can be shaped without cracking. It’s then placed onto a wooden board engraved with tiny characters. As the surface is carefully hammered, leather tools are used to press sharper edges into the copper, ensuring