Those Near Ink Become Black 近墨者黑

The worst poison is not immediately lethal.
It is slow-burning, which poisons and destroys more and more,
without the poisoned knowing so,
until it is too late.
None are as poisoned as those poisoned thus.

Even for those who think they are very ‘careful’,
it is perhaps impossible for them
to handle black ink indefinitely
without getting stained eventually.
Just ask any professional artist.