Cartridges? I used to do some technical drawing using Staedtler pens and I had to mess around with liquid ink. I always had at least one black fingertip.
I had to have several different pens in different line widths, and I think they were almost 20 bucks each, which the company didn't pick up. Ah, the good old days.
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I had to have several different pens in different line widths, and I think they were almost 20 bucks each, which the company didn't pick up. Ah, the good old days.