Re: Vintage Diagram Drawing Techniques?
They might have used something like a Rotring style ink pen with different size nibs and with a lot of practice blended the lines in, I seem to remember they started at 0.1mm, I've just just looked up in Wikipedia and they came in the following sizes, I used a few as a draughtsman in the 70's.
"A full set of pens would have the following nib sizes: 0.10, 0.13, 0.18, 0.25, 0.35, 0.50, 0.70, 1.0, 1.4, and 2.0 mm"
John
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