A seventeenth-century ink recipe.

To make good ink. Take 5 ounces of the best nuttgalls, break them in a mortar but not in small pieces, then put the galls into one quart of clear rain water or soft spring water, let them stand 4 or 5 days shaking them often, then take 2 ounces of white gum arabick, 1 ounce of double refined sugar, 1 piece of indigo and put in the same and shake them well and let them stand 4 or 5 days more. Then take 2 ounces of good green copperis the larger the better and having first washed off the filth put in to the rest and also a piece of clear gum, about as big as a walnut to set the colour and it will be fit for use.