The list of porcelains made at the Imperial factories about 1730[260] includes a series of imitations of Chün glazes from specimens sent from the palace collections, which serve at once to show the variety of Chün colours and the extent to which they were copied. The actual colours described are: (1) Rose purple (_mei kuei tzŭ_ [Chinese]). (2) Cherry apple red (_hai t´ang hung_ [Chinese]). (3) Purple of the aubergine flower (_ch´ieh hua tzŭ_ [Chinese]). (4) Plum bloom (_mei tzŭ ch´ing_ [Chinese]). (5) Donkey's liver and horse's lung (_lü kan ma fei_ [Chinese]), with the addition of four kinds obtained from other sources.[261] (6) Deep purple (_shên tzŭ_ [Chinese]). (7) "Millet colour" (_mi sê_ [Chinese]). (8) Sky blue (_t´ien lan_ [Chinese]). (9) Furnace transmutation or _flambé_ (_yao pien_ [Chinese]). The potters of the Yung Chêng period (1723-35) succeeded wonderfully in their work of imitation, and existing examples bear witness to the beautiful colour effects which they obtained. The body of the ware, however, was, as a rule, a fine white porcelain,[262] which had to be carefully concealed by the brown glaze on the base. Many of the Yung Chêng specimens are marked with the seal mark of the period, and occasional instances occur in which this mark has been ground off in order to pass the piece as old. I have such a specimen, which was actually bought in the trade for Sung. It is a small dish, with beautiful turquoise green glaze in the centre and a _flambé_ red on the sides. The place where the mark has been ground away when washed clean showed a fine white porcelain body. It is stated in the _T´ao lu_ that the potters at Ching-tê Chên began to imitate the Chün wares towards the end of the Sung dynasty. No evidence is given to support the assertion, which may be merely a local tradition; but one certainly sees occasional specimens with a porcelain body masked by a dark brown clay dressing under the base, the glazes of which obviously imitate the Chün. There are, for instance, saucers and bowls of this kind with purple glaze finely shot with grey on the exterior and a lavender grey inside which appear to be older than the Yung Chêng period, though their shape precludes a greater age than the Ming dynasty.