3Oysters (or 3 Oysters? who knows) is a Korean ink company. Mustard is part of their Delicious line, which come in 38mL cube-ish bottles that have a corner missing, so as to allow you to tip the bottle over and refill better. Or so they say, anyway - I wouldn't know, because this is from a sample from the generous amberleadavis. Thank you, Amber!
This ink is a delightful dark mustardy yellow brown. I noticed that is seemed to "soak in" to papers a bit more compared to the average ink. I think I will save this to use on TR and such for the nice crisp halo.
Bleeding: A bit more than average on bad paper; see the "soaking in" comment, but none on fp-friendly
Dry time: Nothing out of the ordinary.
Feathering: A bit more than average on bad paper; see the "soaking in" comment, but none on fp-friendly
Haloing: Yes, and beautifully so, but not in a fine nib on moderately good paper
Lubrication: Less than average
Shading: Very much.
Sheen: None whatsoever
Smudging: None when dry
Water Resistance: Surprisingly, a bit survived after contact with some droplets, but don't bank on it.
Closeups: You can see here some weird white-ish spots in the text, making it look a bit chalky. These are present under magnification but really difficult to see in real life.
Wing Sung 659 F, on Campus Business Line (moderately fp-friendly)
PenBBS 352 on Maruman Loose Leaf (very fp-friendly)
PenBBS 352 on Campus Business Line (moderately fp-friendly)
PenBBS 480 on Campus Business Line (moderately fp-friendly)
Water resistance and nice haloing
0.6 Stub on etranger di costarica paper (very fp-friendly)
And a doodle!