25pcs Black CCL Anti-etching PCB Circuit Board Ink Marker Pen For DIY PCB
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I cleaned some board and drew 7 lines on it. I then let it dry and went over 6 of those again, then over five, then four... so I had seven lines ranging from one to 7 coats of etch resist. Etched in ferric chloride solution and all lines came out wonderfully. There was no difference between the line with one coat and the line I'd covered seven times. Only down-side is that the tips are quite big so fine tracks are an issue.
https://es.banggood.com/25pcs-Black-CCL-Anti-etching-PCB-Circuit-Board-Ink-Marker-Pen-For-DIY-PCB-p-1162261.html
thenks
Товар соответствует описанию.
Sono perfette hanno due punte una grande e una fine ottime per i circuiti stampati.
nice product
I have a problem the pen dont write and i buy 25 pen that i have big lose and i have a pictcher and video and i past it