A spirit duplicator (also referred to as a Ditto machine in North America, Banda machine in the UK or Roneo in France and Australia) was a printing method invented in 1923 by Wilhelm Ritzerfeld and commonly used for much of the rest of the 20th century. The term "spirit duplicator" refers to the alcohols which were a major component of the solvents used as "inks" in these machines. The device coexisted alongside the mimeograph.
Founded more than 30 years ago, The Conservation Center has grown into one of the nation’s leading private art conservation laboratories. The Center’s clients include some of the country’s most prestigious private collections, museums, galleries, and corporations. The Conservation Center’s 28,000 sq. ft. laboratory, designed by Studio Gang Architects, houses conservators of many disciplines on staff. With experts ranging from paintings, to works on paper, to antiques, furniture, and more—The Center places special emphasis on a unique, multifaceted approach to treating fine art and objects.