hjl4 said:I also leave most of the copper on the board, and remove only in between traces.
mstechca said:Thanks.
The boards I buy are always coated with etch-resist and a white layer which I must peel off before using it. The image transfers on fine, but the problem I seem to have is etching the 1/2mm spaces in between tracks.
I bet my transparencies or glass I am using are extra dirty and I'm not noticing it.
Has anyone tried using transpariencies, and actually scratching the image on to the board before exposing it? and is that even possible?
maybe then I can get cleaner results.
justDIY said:sounds like you need to expose for longer ... the light softens the resist, and the developer eats it away
make sure you set your laser printer to print with as much toner as possible, so the transparency is good and dark (set to highest res, turn off resolution enchancement or resolution reduction and any toner savers)
expose it to UV light for 3-5 min
I have had bad ones, because I overexposed it
mstechca said:I expose mine under a halogen lamp. It is brighter than an incadescent bulb.
I think someone needs to find me a better exposure time, because 5 minutes to me is way too low.
Oznog said:I found using 2 transparencies was FAR better.
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