Thunderchild
New Member
I'm thinking of making my own UV exsposure box for making PCB's. How many watts of bulb per square cm should i have ?
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I've observed that all the "UV" LEDs that I buy glow what looks like purple to me. Is this me, or are they not actually UV? They don't actually confess what their wavelength is; what is the typical wavelength of LEDs that claim to be UV?
And the money question: Are they the ones you would use for PCB exposure? (e.g. GC Chemicals cat No 660 etc.)