I've just etched a small board (ARM JTAG interface) using the new tank and it looks very nice. The instructions suggest two minutes to warm the solution after switching the heater on; I used about five minutes, and at least 20 minutes is probably about right. Because of the low temperature etching took about 15 minutes. I used my usual photo-etch technique with artwork produced on an HP DeskJet 5940 inkjet printer using Premium JetStar film. The text on this board had the default 5 mils line width, and came out perfectly. Narrowest track size was 12 mils, though. Here is a photo of the PCB: http://www.leonheller.com/pcb.jpg Leon
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Velleman PCB Etching Tank ET-20
2007-03-22 by Leon Heller
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