Re: Vintage Diagram Drawing Techniques?
Dried Rötring can always be cleaned with a weak solution of caustic soda - as a circuit draughtsman many years ago, I'd sometimes find that one of my pens had dried and it was a matter of a long soak, then dismantle it and soak again before a rinse in lots of water. Of course, putting the wire back into a 0.18 pen is not for the faint-hearted....and I'm glad I never tried a smaller one.
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Richard
Index:
recursive loop: see recursive loop
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