Dense and warm in hand; ages into a one-of-a-kind patina.
What it is
Copper is a warm, reddish-orange metal and one of the oldest metals people have worked by hand. At roughly 8.9 g/cm³, it is denser than Stainless Steel. It is relatively soft and easy to shape, which makes it a favorite for EDC coins, sliders and accents that are meant to show their age.
How it feels in your EDC
Copper has a dense, substantial feel and warms quickly in your hand. Many people enjoy that weighty, tactile presence in a pocket piece. Because it is softer than steel or titanium, it picks up marks more readily, and for many collectors those marks are part of the appeal.
Care & aging
Copper reacts with air and skin oils, so it gradually darkens from bright orange to deeper brown tones. This patina is natural and many people like the character it adds. It can also leave a temporary metallic smell or light stain on hands. To bring back the shine, use a copper cleaner or a gentle polish; to keep the patina, simply wipe it with a dry cloth.
是什么
紫铜（Copper）是一种温暖的橙红色金属，也是人类最早手工加工的金属之一。密度约 8.9 g/cm³，比不锈钢更高。它相对较软、易于塑形，因此深受 EDC 硬币、推牌和装饰件的青睐，尤其是那些本就希望留下岁月痕迹的作品。
上手感受
紫铜手感密实厚重，握在手里很快就会变暖。很多人喜欢口袋小物带来的这份分量和触感。它比钢和钛软，更容易留下痕迹，而对很多玩家来说，这些痕迹正是魅力所在。
保养与老化
紫铜会与空气和皮肤油脂发生反应，逐渐从亮橙色变成更深的棕色调。这层包浆是自然形成的，很多人喜欢它增添的个性。它也可能在手上留下暂时的金属味或浅色印迹。想恢复光亮，可用紫铜清洁剂或温和的抛光剂；想保留包浆，只需用干布擦拭。
