Posted 2 years ago
So in Loetz terms, what do we mean when we say Diana? Generally it is the green (Diana) oil spot over a pale blue (Ozon) background. A peek in the back of the Neue Gallerie Hatje Cantz English language version of Loetz Bohemian Glass, 1880-1940, gives a list of colors used by the Loetz factory - both the English translation and the original German names for the colors, which are found throughout Loetz Boehmische Glas, Band 2, Musterschnitte, describing which colors and decors were used on which forms. As photograph number 1 shows, Diana is listed among the greens. Note also that "Ozon" (Ozone in English) is listed among the blues. This is important for reasons I will get to directly.
Photograph number 2 shows, in the back of the Musterschnitte, some of the decors found on Serie II, Form Nr. 146 (the Diana piece shown in Part 1 of this series). Some interesting things are found here - 1) Ozon (blue) cisele (carved oil spots), 2) Ozon mit Diana Cisele (blue glass with green oil spots), and 3) Diana Glatt!
A side note here - whenever a color immediately precedes the word "cisele" the color refers to the color of the oil spots. The color by itself, i.e. "Diana Glatt" would refer to the color of the glass (the "ground") and not necessarily of any surface treatment.
At any rate, the takeaway in looking at this list of decors is that both Diana and Ozon are colors that may refer to EITHER the color of the ground (glass) OR the color of the applied oil spots (cisele)
Photo number 3 shows (again from the Musterschnitte) form Nr. 622 (also known as Max Emmanuel commissioned form 346/366), and Photo number 4 shows another piece from my collection in that shape. Note the green color of the ground (Diana?) and the blue oil spots on the bottom. This piece has been referred to by me and other collectors a "Cobalt Cisele". More on this in Part 3.