Sailor did not release a correlated red ink bottle to this cartridge (according to the store I usually go), I got this cartridge for my newly found F-8 and about to just keep the shell and suck all the ink out. Sailor cartridge is relatively big – it holds about 1mL of ink (with pipette measurement) and the converter usually only takes 0.5-0.7mL.
So. the color. This is slightly brighter than Pilot Red but not to the level of Kobe ink #20 (can’t remember the name right now) Solid red that didn’t give much of shading. I’m not sure if it’s because it’s a cartridge or it’s in F-8, the drying time is very short as all other red ink (less than 10 sec) Not surprised with no water resistant though. Even with F-8, the ink flow is still wet and did not bleed through iPaper UCCU, DoubleA, and Chashin paper.
CP value: 80/100, if you need to use red ink with Sailor pen daily or just need a large cartridge for your pen