All three plate craftsmen were eager to demonstrate their skills before the King and the Crown Prince, and immediately took their stone plates to make serious attempts at printing.
All three were experts in printing, and stone plate printing was indeed overly convenient and simple. All of them were successful in their first attempt.
However, the eldest craftsman, noting some flaked-off dry ink on the stone plate, suggested,
"Your Highness, perhaps the ink primer could be thicker."
Joseph nodded, "The specific consistency of the ink will need to be adjusted by yourselves."
He only had a general knowledge of the stone plate printing process, and the technical details of the craft would still have to be perfected by these experts.
The craftsmen immediately began discussing:
"We should add some bitumen."
"Yes, we could also try adding some resin..."