Yes, it changes color, too. Initially was a lighter grayish blue and then became the color in the photo after oxidation.
Very quick drying time, I’m not sure if this is because of the weather in TW (so crazy hot… 36C and feel like 42C…) or it actually dries this fast. Saturated with some shading, the ink flow is wet but didn’t bleed through iPaper UCCU or DoubleA (man, I love KWZ) About the water resistant, might just because of the color, it looks like the color didn’t get washed off.
This bottle somehow similar to the blue black from the same brand that if not for collecting reason, I might not buy this bottle (since I got blue black first)
CP value: 85/100, you probably only need 1 between this and blue black