Towards the middle of the century, porcelain was made for the first time at Alcora. A contract was drawn up on 24th March, 1764, with a German, called John Christian Knipfer, who had already worked there in the pottery section. By the original agreement, which exists at the Archives, we find he was to prepare works of "porcelain and painting similar to those made at Dresden, during a period of six years, under the following conditions:" "That the said Knipfer obliges himself to make and teach the apprentices the composition and perfection of porcelain paste, its varnishes, and colours, and whatever he may know at the present time, or discover during this period of six years; he is not to prevent the Director of the Works from being present at all the essays made." "The said Knipfer offers to make and varnish porcelain, and to employ gold and silver in its decoration, and in that of the ordinary wares; likewise the colours of crimson, purple, violet, blues of different shades, yellow, greens, browns, reds, and black. "That Knipfer will give up an account of his secrets, and the management and manner of using them, in order that in all times the truth of what he has asserted may be verified." From the original documents which exist we gather that Knipfer was chiefly famed for his excellence in the painting and decoration of porcelain. François Martin was engaged in 1774 for his skill in preparing different pastes for manufacturing porcelain and pipeclay. He agreed to make "hard paste porcelain, Japanese faïence, English paste (pipeclay), and likewise to mould and bake it. The necessary materials were to be provided by the Count of Aranda." His expenses were to be paid if the specimens he presented to the competent authorities gave a satisfactory result, and his salary was to be increased to 1200 francs a year. Knipfer and Martin greatly added to the importance of the works made at the manufactory. Don Pedro Abadia, the Count's steward, an intelligent man, possessing great scientific knowledge, who had studied this subject in Paris and London, writes to the Count that the presence of both these artists was of absolute necessity at Alcora, "until the workmen who were near them perfected themselves." For owing to the carelessness of the managers of the porcelain works in 1776 Count Aranda wrote from Paris, during his embassy there: "My pottery of Alcora, notwithstanding every effort which has been made, the money spent, and foreign masters which have been brought over, gets worse every day instead of improving." Abadia repeats this in his reports. Porcelain of other kinds decidedly improved. He says also that the pipeclay which Martin had found at Alcora was the best in Europe.