File:Siyah Mashq, c. 1850-1900.jpg

English: This calligraphic practice sheet includes a number of diagonal words and letters used in combinations facing upwards and downwards on the folio. The common Persian cursive script nasta'liq is favored here over the more "broken" shikastah script.

These sheets -- known as siyah mashq (lit. black practice) in Persian -- were entirely covered with writing as a means to practice calligraphy and conserve paper. In time, they became collectible items and thus were signed and dated (this fragment, however, does not appear signed or dated). Many fragments such as this one were provided with a variety of decorative borders and pasted to sheets ornamented with plants or flowers painted in gold. For example, a number of siyah mashq sheets executed at the turn of the 17th century by the great Iranian master of nasta'liq script, 'Imad al-Hasani (d. 1024/1615), were preserved and provided with illumination by Muhammad Hadi ca. 1160-1172/1747-1759 (Akimushkin 1996: 65, 70, 87, and 91).

As an established genre, practice sheets abided to certain rules of formal compositions, largely guided by rhythm and repetition (Safwat 1996, 32). Although siyah mashq sheets survive from ca. 1600, they seem to have been a particularly popular genre during the second half of the 19th century, i.e., during the artistic revival spearheaded by the Qajar ruler Nasir al-Din Shah, who reigned 1848-1896 (Mehdi Zadeh 1369/1950: 44-45 and 54-55; and Diba and Ekhtiar 1998: 239-41).

A number of other siyah mashq sheets are held in the Library of Congress. See in particular 1-87-154.45, 1-84-154.46, 1-85-154.88, 1-87-154.142, and 1-86-154.144.