The gilt and pierced leaf with applied calligraphic Quranic composition in thuluth script, mounted on black board, framed and glazed. To achieve this work, the calligrapher begins by painting his inscription in ink on the sheet and then fixes it with a sheath of wax applied to each side of the sheet. Then he immerses the latter in an alkaline solution so as to dissolve the flesh, and does not remove it until the ribs appear and the inscription then covered with gold leaf. Calligraphy on a Judas tree leaf. Text: Janat eadn muftahah lahum al’abwab surah sad vv.50