<html><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><br class=""><div><blockquote type="cite" class=""><div class="">On Feb 20, 2025, at 5:02 AM, Roman Sowa via Synth-diy <<a href="mailto:synth-diy@synth-diy.org" class="">synth-diy@synth-diy.org</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="">I make lettering with laser engraver. Well, I used to make, as I don't make anything these days. Anyway, turns out that 2.5W LED laser is enough to blank out black anodized aluminium. </div></div></blockquote><div><br class=""></div><div>I can engrave anodized aluminum business cards with 3W at 30mm/s. Higher power could be used but the results won't be quite as pretty. Most people would never see any difference.</div><div><br class=""></div><br class=""><blockquote type="cite" class=""><div class=""><div class="">But it depends where it was anodizes and how. At some point I got black strips of aluminium that was fully resistand to my laser. Literally not a trace left at all.<br class=""></div></div></blockquote><div><br class=""></div><div>Could be variation in the thickness of the anodized layer. This happens with pretty much every material so you have to test and test.</div><div><br class=""></div><div><br class=""></div></div><div class="">
<div dir="auto" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div dir="auto" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div>Terry Bowman, KA4HJH<br class="">"The Mac Doctor"<br class=""><br class=""><a href="https://www.astarcloseup.com" class="">https://www.astarcloseup.com</a></div><div><br class=""></div><div>#1: There is no substitute for good tools;<br class=""><br class="">#2: Always use the right tool for the job.</div><div><br class=""></div><div>Linn Westcott</div></div></div>
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