Is it permissable for a person to put the pages of the Qur'an in water and drink the combination of the ink from the pages of the Qur'an and the water to ward off the jinn? Also is the ink used in Qur'an called saffron

Alhamdu Lillah

Drinking the water mixed with the ink might not be healthy-if it is not even harmful- but reciting Quran on water to drink and bathe the body from it for treatment purposes is what has been authentically reported.

 Saffron could be used as an ink to write Quran, but all written Quran was done with saffron.