→Labelling
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Controls for particular functions can be grouped together by panel graphics. Individual controls labels can be with text and others with graphics. Scales can be indicated with tick marks. Signal routing can be indicated. Besides writing or painting directly on the panel by hand, there are a number of different methods to add labelling. Traffolyte laminate or Dymo embossed labels were once common. Adhesive labels tend to fall off after a while. Laser printed graphics are common now, as well as a variety of iron-on transfer methods.<ref name="fpemw"/>
Note that for some of the methods listed here panels can be given a protective coating of matte or gloss clear lacquer after
=== Adhesive polyester ===
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=== CNC engraving ===
Requires a large investment to produce panel drilling approaching commercial quality.<ref>[https://www.muffwiggler.com/forum/viewtopic.php?t=57836 Anybody using a Fireball CNC router to make panels/ pcb ?], Muff Wiggler forum, April 2012</ref> It's more efficient to use a drill press for making holes and use CNC for engraving. Engravings in anodised aluminum panel can be blackened with [https://web.archive.org/web/20150908063148/https://www.birchwoodcasey.com/Refinishing/Metal-Finishing/Aluminum-Black-Touch-Up.aspx Birchwood Casey Aluminum Black]<ref>[https://www.muffwiggler.com/forum/viewtopic.php?t=64990 DIY CNC milling/labelling of steel panels], Muff Wiggler forum, Aug 2012</ref> or coloured using a [http://www.markal.com/solid-paint-markers/lacquer-stik/ Markal Lacquer-Stik].<ref name="tips">[http://www.engraverssolutions.com/PDFs/tips&tricks-color_filling.pdf Tips & Tricks], Engravers Solutions</ref><ref name="infill"/>
=== Dry transfer lettering ===
Dry transfer lettering will adhere to smooth clean surfaces. The ink contains a pressure-sensitive heat-resistant adhesive. First remove the protective backing sheet then hold the symbol or letter firmly to the panel surface and rub around it with a wooden burnisher, pen or pencil. Take care to avoid rubbing adjacent letters/symbols. Gently lift an edge of the film to check transfer has been sucessful. The backing sheet can be used to further burnish the transfered characters. A wax residue remains on non-porous surfaces. This can be removed with thinners and a soft cloth. To improve durability apply a coat of protective lacquer after.<ref name="electech"/> Custom transfers can be produced by inkjet or laser printer using dry rub off decal paper.
=== Etched ===
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