OFFERED BY
P.O. Box 206 Piermont, NY 10968 845.359.4305
Email Dealer
$ 1,500

An Impressive Imperial Yellow Rosenthal Silver Overlay and Enamel Tall Vase

Origin Germany
Period 1950-1979
Materials Rosenthal Porcelain
Dimensions
W. 8 in; H. 17 in; Diam. 8 in;
W. 20.32 cm; H. 43.18 cm; Diam. 20.32 cm;
Condition Excellent. Perfect. No Restoration
Creation Date 1953
Description Friedrich Deusch
Rosenthal porcelain
The specific feature of German silver overlay is the degree of purity – 925 for Sterling silver or 999 for fine silver. The quality of silver used for German overlay can be seen by identifying the impressed 1000 mark (usually on the base or side of an item). The purity and thickness of the silver overlay ensure the beauty of the item is maintained without any loss of the silver even after many years of cleaning. Friedrich Deusch invented a way to combine silver and a non-conductive surface such as porcelain or glass with galvanization. He achieved this with a special conductive fluid (a type of flux) which was fixed permanently on the prepared form. The particular objects (such as a vase) were first roughened by engraving or using hydrofluoric acid to etch a design. This implies that a very exact covering of the surfaces had to be achieved to prevent any damage to areas which were not to be overlaid. Maybe they used a masking lacquer which could withstand the following baking in the kiln which was used to fuse the flux with the surface of the item. The next step was to galvanize the item with the purest silver (1000). It was very important to monitor items being overlaid with silver – waiting too long resulted in visible dark spots and slight roughness where the cathode or anode was fixed. The cathode and anode were used to charge the item electronically and this allowed the fusion of silver to the area painted with the silver flux. The thickness of silver desired on the finished item determined how long the item needed to be left in the silver bath; this could be more than 30 hours. Finally, if the masking lacquer (discussed earlier) did not burn in the kiln, it must have been removed later (probably with chemical fluids). When colored enamels were to be used on the finished product, they had to be fired prior to the final stage of the silver overlay process.
The company either leased the technology or produced ware at some time for most of the top manufacturers in Europe, also Lennox in the USA used the technique.
Styles / Movements Art Nouveau, Art Pottery, Mid Century
Catalog References Collectors journal (Sammlerjournal) of 2009, pages 38 – 4
Article References https://en.wikipedia.org/wiki/Silver_overlay https://ipfs.io/ipfs/QmXoypizjW3WknFiJnKLwHCnL72vedxjQkDDP1mXWo6uco/wiki/Silver_overlay.html
Dealer Reference Number IC 137
Incollect Reference Number 196207
Sign In To View Price close

You must Sign In to your account to view the price. If you don’t have an account, please Create an Account below.