Posted 6 years ago
My long wait is over! I've been dying to own a Stevens and Williams Silveria vase for a very long time. However, the few examples that have come up in the past were either much more than I was willing to spend or had significant burn damage. Simply put, the technique S&W used to make their silveria glass involves actual silver foil sheets sandwiched between two layers of glass. As opposed to the burst foil technique - where the sheet of foil is applied to the glass in the early blowing stages allowing it to break up into small fragments, S&W did not apply the foil until the piece was already shaped allowing the silver foil to remain intact. An inherent part of making the glass is that burst air bubbles, or other openings on the surface, allows air to come in contact with the silver causing it to oxidize and discolor resulting in the burn marks you see on all S&W Silveria glass. Some pieces have very minimal burn-through while others have quite a bit. Although it can look unsightly, this is perfectly acceptable and expected by collectors. Kralik also made Silveria glass but their process didn't involve the use of silver. One of the easiest ways to differentiate between the two is that the green threading on Kralik pieces typically runs horizontally while S&W's are vertical. As always, thanks for looking!