You probably have no idea where the ink in your pen comes from, much less whether it's a simple factory process or demanding of more expertise. Josh Velson, a chemical engineering consultant for bio and petrochemicals, has your answer.
You probably have no idea where the ink in your pen comes from, much less whether it's a simple factory process or demanding of more expertise. Josh Velson, a chemical engineering consultant for bio and petrochemicals, has your answer.