Back in the middle ages books were painstakingly hand printed one letter at time by monks with pens using lead based black ink.
Since the monks were of the habit of pointing their brushes by twirling them in their lips, many of them succumbed to lead poisoning.
A less toxic ink was developed by replacing the lead with zinc.
Of course, now we know it as ‘printer’s zinc’...
That’ll cost you.
Although you can get 15% off if you’re a Best Buy rewards member.