I just got an order from Swisher that included an bottle of Noodler's Red-Black. I haven't had a chance to really go crazy with it, but so far I really like it.
I put it in my Safari with a 1.1 nib with the intention of using it to add notes to my sketches. I'm really happy with the results. When I tried using black ink in the Safari, the lines came out too heavy and overpowered the drawings. The Red-Black matches up nicely with my doodles. I guess that now I need to practice my handwriting with the italic nib.
Here are a few samples.
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