Investigate a variety of black ink markers, and find out why they look black ... which stands for red, orange, yellow, green, blue, indigo, and violet. A red object looks red because it reflects the ...

Dr Henry Stephens was at medical school with John Keats, but later (in 1832) invented his famous 'Blue-Black Writing Fluid', which he developed into writing ink. It was in about 1834 that he began ...