Before starting any repairs, I do a full inspection of what may have caused the issue. Here, the inside rim of the cap is gunked up with old solder and old foil. Its unable to attach to the glass, since the copper foil adhesive has broken down. Note that I've marked each piece along the border of the dome with a number and an arrow pointing to the cap. I also took photos of the other side so that I would have a record of where each piece of glass belongs as I begin to dismantle the top edge of the lamp.
I then reinforced the border piece by adding a length of wire to the top border as shown. I extended the wire to the adjacent pieces, so that all three pieces will be strengthened.
More pieces have been replaced .. A few more to go. A total of 17 pieces of glass were replaced.
At this point, I've removed and cleaned and re-soldered 13 pieces of white glass. Shown is the interior of the dome before it was soldered. With a bit of muscle and by coaxing some glass to tilt a bit, I was able to work the cap back into place inside the dome.
Below, I'm applying Novacan Black Patina to the solder. I waited a short time for the solder to set, then I washed the lamp, dried it, and applied a light finishing polish. This protects the solder and gives the glass a nice shine.
And here is the repaired lamp. I set it up temporarily on my own lamp stand. Thank you, Constantine, for bringing your wife's favorite lamp to me for repair. My husband Eric and I enjoyed meeting you!
Please visit my website to see my custom windows and repairs (click here). And if you are on FaceBook, become a fan and I'll keep you up to date on all my stained glass projects. Call me any time at 201-600-1616 or email with your questions. Thanks!