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This whistle fights fascists | How thousands of 3D-printed whistles are derailing ICE.
(www.theverge.com)
this post was submitted on 09 Feb 2026
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Heat stamping might be quickest alternative. Should be rugged and aid low-vision use.
Full brass letterpress type sets and die can be pricy, but the cheap leather iron kits at craft shops commonly include small metal alphanumeric types that could be set (clamped) and affixed to your stamp (burning/soldering iron or pliers + hot plate/stove).
if it’s not multicolour then you can just make the printer leave indents for the letters (or print extra material to have it raised)
no need for post processing or extra equipment which slows down the process and adds extra work