Golden glow and satisfying heft; patinas with every carry.
What it is
Brass is an alloy of Copper and zinc. The zinc shifts Copper's reddish tone toward a warm gold and makes the metal harder and easier to machine cleanly. At roughly 8.5 g/cm³, it sits close to Copper in density. The exact mix depends on the maker, which is why brass can range from pale yellow to deep gold.
How it feels in your EDC
Brass has a dense, satisfying weight and a smooth, warm feel in hand. Many people like its classic, vintage look in coins, sliders, beads and buttons. It holds crisp machined details and textures such as knurling well, while overall feel still depends on the design.
Care & aging
Brass reacts with air and skin oils and slowly develops a patina, usually toward deeper antique gold and brown tones. It tends to change more gradually than Copper. Like Copper, it can leave a temporary metallic smell on hands. To restore the shine, use a brass polish; to keep the aged look, wipe it with a dry cloth and let it be.
是什么
黄铜（Brass）是紫铜与锌的合金。锌让紫铜的红调偏向温暖的金色，也让金属更硬、更容易加工出干净的效果。密度约 8.5 g/cm³，与紫铜接近。具体配比取决于品牌，所以黄铜颜色可以从浅黄到深金不等。
上手感受
黄铜分量密实讨喜，握感顺滑温润。很多人喜欢它用在硬币、推牌、珠子和按键上的经典复古感。它能很好地保留清晰的加工细节和滚花等纹理，而整体手感仍取决于设计。
保养与老化
黄铜会与空气和皮肤油脂反应，慢慢形成包浆，通常朝更深的古金色和棕色变化，变化速度一般比紫铜慢。和紫铜一样，它也可能在手上留下暂时的金属味。想恢复光亮，可用黄铜抛光剂；想保留做旧感，用干布擦拭、顺其自然即可。
