119 Ostwald’s double cone from 1923 True to original reproduction of Ostwald’s double cone with 2,520 patterns using the original color spreads: 24 triangles of the same color with 105 derivatives of the same tone each. Execution Fritz Rausendorf, Leisnig 1965 (estate Streller and Rausendorf/gift Hönle) Adam’s color chart according to TGL 21579, Dresden 1966 Manfred Adam’s design of the TGL* color chart as an aesthetic- technical system. L/T/K was first presented at the International Color Conference Interfarbe 1966 at the Deutsches Hygiene-Museum Dresden and was intended to serve for the production of “made to measure” color samples. * technical standards in the former GDR, 1955–1990 Prases color fan “Le clef de l’harmonie de couleurs”, Aue 1935 The unique 24-part color fan, designed and realized by Otto Prase in 1922, and awarded several prizes at trade fairs – toned down in eight stages to a total of 408 tonally identical derivatives – went into mass production after Prase left Baumann’s company in the mid-1930s. (Prase estate)
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