what is the most efficient ways to test all the fountain pen inks available and to make a like for like comparison? For instance i have tested Waterman, Herbin, Viscontini and Diamine but the shade of colour vary a great deal i like Visconti Bordeuax as a red but on other days i may like Diamine Oxblood but i like the wetness of a waterman red ink. I aim to reduce to a set number of of inks, so a maximum of two for each of the colours Red, Green, Blue, Black.for daily use. 1 unique colour such as an orange/brown/purple for journal writing. let me know your ideas thanks