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Reddit mentions of XLX 20pcs PCB Print Circuit Board Carbide Tungsten Steel Jobber Micro Drill Bits Set Shank 0.3 to 1.2mm (2 each)
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Reddit mentions: 1
We found 1 Reddit mentions of XLX 20pcs PCB Print Circuit Board Carbide Tungsten Steel Jobber Micro Drill Bits Set Shank 0.3 to 1.2mm (2 each). Here are the top ones.
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1. Size: 0.3-1.2mm2. cutting edge strictly symmetrical: beneficial and efficient cutting, avoid offset drilling3. Various drill bit kinds, used in a variety of application needs4. Made tungsten carbide bits5. Fit for: PCB drilling machines, engraving machine, CNC and high precision special drilling equipment
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I find it pretty easy. Definately easier than perfboard for anything larger than a few components imho. Takes a little practise, mostly trial and error getting the iron temperature and timing right for the toner transfer. I find that the higher end of the wool setting, and about 90 seconds of pressure works well for me. Yes you need a laser printer if using the toner transfer technique, but there's more than one way to skin a cat. You also need some small drill bits. You can buy a kit from Amazon for cheap. I use a rotary tool because I don't have a drill press and hand drill is a bit heavy and I was breaking a lot of bits.
As for toxicity, it depends what you're using. Ferric chloride is most common (it's hydrochloric acid and iron) but there are other options. Gloves and eye protection are a must, as well as ventilation. You can neutralize it with a base, but the copper is toxic to the environment so you don't want to flush it either way. Here's the SDS for it.
This article I found very helpful