Whoever might need, for whatever reason, to write on a parchment sheet which had already been written, should take some milk and should put the parchment in it for one night’s time. As soon as it is taken out, it should be strewn with flour in order that it not be wrinkled after it begins to dry, and so as to be kept under pressure until it dries out. After it is done, the parchment will regain its former quality, shining and lucid, by means of pumice stone and chalk.