"Daum is a crystal studio based in Nancy, France, founded in 1878 by Jean Daum (1825–1885). His sons, Auguste Daum (1853–1909) and Antonin Daum (1864–1931), oversaw ...
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its growth during the burgeoning Art Nouveau period. Currently Daum is the only commercial crystal manufacturer employing the pâte de verre (glass paste) process for art glass and crystal sculptures, a technique in which crushed glass is packed into a refractory mould and then fused in a kiln." - (en.wikipedia.org 10.08.2021)
