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.
Ibn Taymiyyah quoted the view of Ahmad and mentioned that it was permissible to write some verses from the Quran using permissible ink and wash them with water and then let the patient drink it. Referring to this, ‘Abdullaah ibn Ahmad reported on the authority of his father (i.e. Ahmad ibn Hanbal) that Ibn ‘Abbaas said that when a woman faces difficulty in childbirth, the following may be written for her:
"Bismillaah. Laa ilaaha illa Allaah Al-Haleem Al-Kareem. Subhaanallaah Rabil-‘Arsh Al-‘Atheem. Al-Hamdulillaahi Rabil-‘Aalameen (In the name of Allaah, none is worthy of worship but Allaah, the Forbearing the Generous. Exalted is Allaah the Lord of the Great Throne. All perfect praise be to Allaah, The Lord of the worlds).
{It will be, on the Day they see it, as though they had not remained [in the world] except for an afternoon or a morning thereof.} [Quran 79: 46]
{On the Day they see that which they are promised - as though they had not remained [in the world] except an hour of a day. [This is] notification. And will [any] be destroyed except the defiantly disobedient people?} [Quran 46: 35]
He also reported on the authority of his father that it was permissible to write verses from the Quran on a clean vessel, wash it with water and let the patient drink it. Wakee' added to the narration of Ibn ‘Abbaas that the woman drinks from the water and the part of her body below the navel is sprinkled with it.
Consequently, we see that it is permissible to do this when the following prerequisites are satisfied: Using pure ink when writing the Quran and writing it on a pure object. One should not write the verses with blood, as some ignorant people do, because blood is impure and the Book of Allaah and His verses are not to be exposed to impurities.
The Hanbali scholar, Ibn Muflih mentioned that Ibn Taymiyyah used to write on the forehead of the patient in cases of nosebleeding: {And it was said, "O earth, swallow your water, and O sky, withhold [your rain]." And the water subsided, and the matter was accomplished.} [Quran 11: 44] Ibn Muflih added that it was not permissible to write it with blood because blood is impure and the words of Allaah The Almighty must not be written with it.
Sources:
1. https://islamqa.info/en/answers/259398/ruling-on-writing-verses-for-ruqyah-on-dissolvable-paper
2. https://www.islamweb.net/en/fatwa/7852/prerequisites-of-writing-ruqyah-and-drinking-its-water
