Review on Winsor Newton Calligraphy Bottle Black by Hannah Curi

This ink advertises itself as a fountain pen refill and still doesn't work smoothly. I tested this by going back to my old ink, thinking there might have been an issue with my pen, but the old ink laid down perfectly and I didn't have to clean the pen. I tried this mascara again and the same problem came up again. It just doesn't run smoothly, you have to flush ink through it to make it work at all. I can try adding some water but I'm afraid to do so so as not to ruin the pen. Very disappointing product from Windsor & Newton.