Chemically etched designs you can see and feel with your fingertips.
What it is
Acid etching creates a design by covering parts of a metal surface with a protective mask, then using an acid or chemical solution to eat away the exposed areas. The result can be logos, text, patterns or artwork. Etching also reveals the layered pattern in Damascus steel. Unlike acid washing, which treats the whole surface, etching is selective. The process depends on the maker.
How it feels in your EDC
Acid-etched designs often look softer and more organic than laser engraving, with a subtle, crafted character. Depending on depth, the design may feel completely smooth or slightly recessed under your fingertips. Etched areas can also be darkened or colored to add contrast, which makes the design stand out more clearly.
Care & aging
Shallow etching and any added darkening can fade slowly with heavy wear or abrasive polishing, especially on raised edges. Clean etched areas with a soft cloth and mild soap, and avoid scouring pads and polishing compounds. Reactive metals like Copper and Carbon Steel may also develop patina around the design over time.
是什么
酸蚀（Acid etching）是先用保护膜遮盖金属表面的部分区域，再用酸或化学溶液腐蚀暴露的部分，从而形成图案，可以是标志、文字、纹样或图稿。蚀刻也用于显现大马士革钢的层纹。与处理整个表面的酸洗（acid washing）不同，蚀刻是有选择的。具体工艺取决于品牌。
上手感受
酸蚀图案往往比激光雕刻更柔和、更自然，带有低调的手作气质。根据深度不同，图案在指尖下可能完全光滑，也可能略微凹陷。蚀刻区域还可以做发黑或上色处理，增加对比，让图案更清晰。
保养与老化
较浅的蚀刻和额外的发黑处理在重度磨损或研磨抛光下可能慢慢变淡，凸起的边缘尤其如此。用软布和温和的肥皂清洁蚀刻区域，避免百洁布和抛光膏。紫铜（Copper）和碳钢（Carbon Steel）等活泼金属也可能随时间在图案周围形成包浆。
