The gold ring is quite large and heavy and I'm having trouble
locating the solder seam to cut it out. I did my reseach and found
a couple of old archive email threads that suggested heating a gold
ring to find the seam. I've done this twice, the first time to a
soft red glow andthe second time to a bright red glow, and still no
seam. Any other suggestions?
Polish the ring first. Heat it using reducing flame. The right time
to stop is when gold under flame looks clean, but when flame is moved
away, it looks black. When such temperature reached, plunge ring in
water and examine using 10x loupe.