Praise be to Allah.
Seeking healing by means of the Qur’an and Prophetic du‘aa’s is prescribed. Allah, may He be exalted, says (interpretation of the meaning):
“And We send down of the Qur’an that which is healing and mercy for the believers, but it does not increase the wrongdoers except in loss” [al-Isra’ 17:82].
Seeking healing may be done by means of recitation, and by means of recitation over the sick person, or recitation over water which is then drunk or used to wash oneself, or writing in the vessel and the like and washing it with water which is then drunk, as was narrated from a number of the early generations.
Ibn al-Qayyim (may Allah have mercy on him) said in Zaad al-Ma‘aad (4/170), regarding ruqyah to treat the effects of the evil eye:
A number of the early generations thought that verses of the Qur’an should be written for him [the one who has been affected by the evil eye], then he should drink it. Mujaahid said: There is nothing wrong with writing Qur’an, washing it, and giving that water to the sick person to drink. Something similar was narrated from Abu Qilaabah.
It was narrated from Ibn ‘Abbaas (may Allah be pleased with him) that he issued instructions that some words of Qur’an be written [in a vessel] for a woman who is experiencing difficulty in childbirth, then those words should be washed with water and that water should be given to her to drink.
Ayyoob said: I saw Abu Qilaabah write some words of Qur’an, wash them off with water and give the water to a man to drink who was suffering some pain. End quote.
There is nothing wrong with writing that on dissolvable paper, with saffron and the like, so long as it is pure, whether it is written by hand or printed with a machine, if that will cause no harm.
What matters is that there should be some ink or substance that can be written with and will dissolve, not that it be engraved on a vessel or on a machine that is washed out with water, because there is no benefit in that.
And Allah knows best.