Bone china cup and saucer manufactured in the USSR by the Lomonosov Porcelain Factory. Marked with the USSR Lomonosov Porcelain Factory hallmark on the base. Used, but in excellent condition. The item is hand-painted with 22-karat gold. Hand wash recommended. Genuine Article – 100% Guaranteed. Hand wash recommended. Capacity: 5.24 fl.oz / 155ml; Cup measures: height 6.5 cm (2 ½"). Saucer measures: Diameter 12 cm (4 ¾") Bone china, a paste containing calcium phosphate (animal bone ash) which imparts whiteness and quality to the material, was first produced by Englishman Thomas Fray in 1749. The Wedgwood ceramics works produced such items and for many years remained the sole global supplier. It is no surprise they were reluctant to publicize their production methods. English bone china, however, proved somewhat thick and did not produce a desirable light sound. The production of bone china necessitated changes throughout the entire manufacturing process, from preparing the liquid casting paste to the firing procedure. In addition to clay, kaolin, feldspar, and quartz, pre-fired bonemeal was added, resulting in a snow-white paste. To preserve the thin and fragile form, firing occurred similarly to stoneware: initially at high temperature, then after glazing, at 100 degrees less. Glazing of this porcelain was achieved via spray application, using an extremely thin layer of glaze; as Vinogradov noted in his records, porcelain glaze should never exceed the thickness of two sheets of paper. The characteristics of this new material were highly valued by leading modellers such as Eduard Krimmer, Anna Leporskaya, and Vladimir Semyonov. The innovative cup and service shapes they created emphasized the thinness, transparency, and whiteness of the enamel while maintaining classical proportions and clear, pure contours. Later, Tatiana Linchevskaya, Nina Slavina, and E. Yeropkina also worked with bone china. This new material and its technical possibilities expanded creative scope considerably. The ceremonial set "White Flower," resembling fully opened white campanulas with emphatically swept edges, designed by Slavina, is testament to this. This work, along with other pieces by Slavina, received the silver medal of the Academy of Arts of the USSR and resides in the collection of the Museum of Russian Applied Arts and the factory museum. Decoration by Alexei Vorobyevski, Tamara Bespalova-Mikhalyova, Mikhail Mokh, and Inna Olevskaya imbued these bone china pieces with an air of costly elegance. Their works immediately achieved collector's item status and secured a place as prestigious gifts. The primary objective remained ensuring bone china would also become items of mass consumption and production. To this end, a dedicated production unit for bone china was established at the Leningrad factory. All installations for this, including technical innovations, were developed within the factory itself. Subsequently, bone china production based on the Leningrad process was extended, with factory assistance, to Lithuania and the Bulgarian city of Vidin.