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a traditional ink made by boiling wood soot. The resulting ink color depends on the type of wood burnt to make the soot. Authentic Bistre is made from Beechwood and gives a transparent, dark brown with yellow undertones. Traditionally prepared Bistre is not considered fugitive but is not entirely stable: improperly aged Bistre is acidic and may fade, while better quality Bistre inks will darken somewhat over time.>>
Brown ink can also be made from walnuts
. N.B. these subtances are toxic and do stain, no matter what you may read on the internet. <<There is a misconception that ink is non-toxic even if swallowed. Once ingested, ink can be hazardous to one's health. Certain inks, such as those used in printers, and even those found in a common pen can be harmful. Though ink does not easily cause death, inappropriate contact can cause effects such as severe headaches, skin irritation, or nervous system damage. These effects can be caused by solvents, or by pigment ingredients such as p-Anisidine, which helps create some inks' color and shine.>>
