This fragment is written in the angular script of a bookhand typical of the tenth century. The baseline is straight. The heads of looped letters such as fāʾ, mīm, and wāw are pointed. 
e.g. farūkhtīm line 3:


 The bowls of descending letters such as yāʾ and nūn are flattened and open.
e.g. ʾīn line 1:


The letter kāf is written in its archaic form with distinct orthogonality, formed of a vertical stroke which transitions into the baseline through a series of three perfect right angles.
e.g. magar line 4:


On the verso, the tails of nūn have been accentuated with a thicker qalam, giving them a distinctive triangular form.
e.g. dīgarān gariyān line 4:

Glossary

Angular — a script style in which letterforms are constructed using straight strokes meeting at sharp angles, without curves; characteristic of early Arabic bookhands and ‘New Style’ Qur’anic scripts

Baseline — the line on which letters sit

Bookhand — a script style associated with the copying of manuscripts, typically more formal and regular than documentary hands

Bowl — the rounded closed or semi-closed curve of a letter which descends below the baseline, as in wāw, qāf, nūn, and sīn

Descender — the portion of a letter that extends below the baseline, as in rāʾ, zāyy, and lām

Orthogonal — composed of right angles; used to describe scripts in which strokes meet at ninety degrees, producing a rigid, angular aspect

Qalam — Arabic term derived from the Greek kalamos; the reed pen used for writing

Further Reading

• https://invisibleeast.web.ox.ac.uk/article/document-month-925-oldest-fragment-joseph-and-zulaykha-persian

This fragment is written in the angular script of a bookhand typical of the tenth century. The baseline is straight. The heads of looped letters such as fāʾ, mīm, and wāw are pointed, while the bowls of descending letters such as yāʾ and nūn are flattened and open. The letter kāf is written in its archaic form with distinct orthogonality, formed of a vertical stroke which transitions into the baseline through a series of three perfect right angles. On the verso, the tails of nūn have been accentuated with a thicker qalam, giving them a distinctive triangular form.

Further Reading

• https://invisibleeast.web.ox.ac.uk/article/document-month-925-oldest-fragment-joseph-and-zulaykha-persian

Glossary

Angular — a script style in which letterforms are constructed using straight strokes meeting at sharp angles, without curves; characteristic of early Arabic bookhands and ‘New Style’ Qur’anic scripts

Baseline — the line on which letters sit

Bookhand — a script style associated with the copying of manuscripts, typically more formal and regular than documentary hands

Bowl — the rounded closed or semi-closed curve of a letter which descends below the baseline, as in wāw, qāf, nūn, and sīn

Descender — the portion of a letter that extends below the baseline, as in rāʾ, zāyy, and lām

Orthogonal — composed of right angles; used to describe scripts in which strokes meet at ninety degrees, producing a rigid, angular aspect

Qalam — Arabic term derived from the Greek kalamos; the reed pen used for writing