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My 2 cents worth in the discussion.
Ive been making prototype PCB's for years and dont have any problem producing PCB's with .010 track widths and spacings using a trusty HP Laserjet, drafting film (herculene) and positive photo-resist PCBs.
Have done surface mount with this no problems. Of course the SMD are much easier to mount with a manufactured PCB with soldermask .. but Im talking prototypes.
Occasionally you get a dud, but that is almost always because the thickness of the photo-resist layer varies and I didnt allow enough exposure / developing time.
Also might add that I did away with ferric chloride and use the ammonium persulphate crystal now. It doesnt keep as long as ferric nor etch as fast but in the spill department its a whole lot better. Ultimately I intend to use cupric chloride .. I just have to get my degree in chemistry to make the mixture.
Happy New Year to you all
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