In our country the pre-sensitized ones are not sold, and lamination type film rolls, i saw with production houses, but outside it is a dream, as it is to be imported in bulk roll
As such we resort to TTS method and gives good results. The next board, i would take snaps and post them.
even if photographic process, i feel the best would be tracing paper as used by engineers of those days. with inkjet printer, it gives a dark enough pint.
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