Diluted inkjet ink works incredibly well! Better and cheaper than anything else i tried, and resistant to water and even alcohol based markers once dry.
a concentration of 5-10% is still very high, and as uniformly pitch black as permanent marker, down to fractions of a percent, to get tones of grey and a more shadable, wash-like ink. it's thin as water, so it runs pretty dry. (good for dry brush effects) but that can be adjusted by "lubricating" it with a little gum arabic, to make it run thicker and smoother. just test it with a brush, and add more if needed. (write down how much you added! ideally use syringes for full controll over the mixing ratios)
You absolutely have to dilute it sufficiently, or it will over-saturate the paper like oil and keep smearing and bleeding. Pigmented ink, ment for HP950 cartridges gave me the cleanest and deepest black so far.
PS: It's perfectly safe for fountain pens too, because the ink contains hardly any dissolved solids, and only becomes permanent when bonding to cellulose.
Diluted inkjet ink works incredibly well! Better and cheaper than anything else i tried, and resistant to water and even alcohol based markers once dry.
a concentration of 5-10% is still very high, and as uniformly pitch black as permanent marker, down to fractions of a percent, to get tones of grey and a more shadable, wash-like ink. it's thin as water, so it runs pretty dry. (good for dry brush effects) but that can be adjusted by "lubricating" it with a little gum arabic, to make it run thicker and smoother. just test it with a brush, and add more if needed. (write down how much you added! ideally use syringes for full controll over the mixing ratios)
You absolutely have to dilute it sufficiently, or it will over-saturate the paper like oil and keep smearing and bleeding. Pigmented ink, ment for HP950 cartridges gave me the cleanest and deepest black so far.
PS: It's perfectly safe for fountain pens too, because the ink contains hardly any dissolved solids, and only becomes permanent when bonding to cellulose.