The main text of the book and the guide for the wise, by Al-Mu'izz ibn Badis
Recipe Details
Preparation Steps
Take half a *mithqal* of sal ammoniac and melt it as it is, then cast upon it the weight of a dirham of *Khawlan*, which is *Al-Hadhid*. Then leave it for twenty days in the sun. Then boil it with gallnuts, then mix with it the weight of two dirhams of mercury and leave it for forty days. Then cast upon it the weight of ten dirhams of sour milk and write with it; it will not be read except at night and in the dark.
Original Recipe Text
Take half a *mithqal* of sal ammoniac and melt it as it is, then cast upon it the weight of a dirham of *Khawlan*, which is *Al-Hadhid*. Then leave it for twenty days in the sun. Then boil it with gallnuts, then mix with it the weight of two dirhams of mercury and leave it for forty days. Then cast upon it the weight of ten dirhams of sour milk and write with it; it will not be read except at night and in the dark.
Remarks
Secret ink readable only at night.
Scientific Analysis
Instrumentally Verified
Not Verified
Metadata
Material Type
ink
Source Information
AuthorAnonymous
CollectionUnknown
Language
N/A
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