The silk had begun to degrade and break, meaning that as they did not have the paper twists inside there was nothing else holding the books together. These two books were instead solely held together by the outer silk thread stitching. Sinica 2505 (dated 1864) and Sinica 2488 (dated 1904) are two very thin pamphlet-sized volumes which lack the internal paper twists that would usually form the structure of a thread binding. Sinica 2505 and Sinica 2488: outer silk thread stitching Instead of constructing a new tao, or extending the old one, the tao and fascicles are now housed in a deep box with the fascicles resting above the tao rather than in it so that both can be viewed together without further detriment to the fascicles occurring. In order to reduce this, the fascicles were removed from the tao and placed between boards and gently weighted for a fortnight. However the 4 volumes of the book (called fascicles) were constricted by the size of their original wrapper (known as a tao), and this had caused distortions throughout the textblocks. Sinica 2887 in new housing, storing fascicles on top of tao with plastazote in between
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