<P> Three main environmental issues with ink are: </P> <Ul> <Li> Heavy metals "Wikipedia" written with self - made iron gall ink </Li> <Li> Non-renewable oils </Li> <Li> Volatile organic compounds </Li> </Ul> <Li> Heavy metals "Wikipedia" written with self - made iron gall ink </Li> <Li> Volatile organic compounds </Li>

Where does the ink in a pen come from