Hello all. This is my review for the penhouse.in inks. Attached below are the swatches of violet (above), and turquoise (below). The paper I have used is the Thought Slot dotted inserts which are readily available on amazon.in. The pen I have used is the Camlin KOKUYO Trinity, which I also got from penhouse.in. The turquoise ones show some amount of feathering on the paper, while the violet does not have the issue. The ink takes about 3 seconds to dry. It is not waterproof. This isn't available in cartridges, but the ink comes in plastic bottles, and costs about Rs. 30, or ~$0.5. The turquoise was kind of disappointing, it seems to be more of a bright blue than a greenish blue shade that I was expecting. The violet is bright and lovely, and writing with it seems like a charm. Regards, Smruthi