Hi Neil,
My problem is how to get a constant amount of silver to fold over
and make a straight edge.
From the beginning (approx 18 months ago), I have cut my bezels from
sterling silver sheet. I use aviation snips which I’ve filed to
remove the serrations. I figured that if I measured accurately and
cut as accurately as possible, I would achieve nice straight bezels -
BUT with human error at play, there is often a discrepancy from one
end to another. No matter. I solder them closed after I know they are
a very good fit for the stone, and then go to work with two grades of
sandpaper on the tops and bottoms of the setting, in a figure of
eight motion (with the sandpaper on a hard, flat surface and moving
the piece over the sandpaper). This flattens them up nicely and gives
a lovely crisp, straight edge. I then make the bearer for the stone
(faceted stone) from sheet sterling also, a few millimeters shorter
in length and approximately 1mm shorter in height. I don’t solder it
closed but keep trimming until it fits inside the bezel really
snugly. I use the stone as a guide, placing it upside down on the
bench and test fit the bezel and bearer onto the back of the stone. I
gently push down on the bezel so that the stone pushes the bearer to
the right level within the bezel. I remove the stone and then solder
the bearer into the bezel from behind. Using this method, there has
always been an even amount of metal protruding above the bearer - at
least as accurately as eyeballing it is concerned.
I used to file a bevel on the bearer before shaping it and soldering
it into the bezel - so that it fit the girdle of the stone. I now
don’t bother doing that, but instead cut the seat after soldering it
in, using precision stone setting burrs. This now gives me a much
neater seat that fits the stone better. The stones now tend to “snap”
into place and sit nice and still while I’m setting them, which has
made my life much easier - I guess it’s all in the preparation.
Settings for round stones are obviously much easier to cut a neat
seat for but the other shapes are slightly more tricky. For shapes
with corners, you have to use a tiny burr in the corners and larger
ones to do the sides but it’s still doable. When cutting the seat,
regularly check the stone for fit. If the stone is something like a
square or rectangle, put a mark on one side of the stone and the
setting so you know which way the stone fits - they rarely fit as
well both ways round! Once the stone fits snugly into the setting,
check how much metal there is to turn over onto the stone, and how
regular it is. With good preparation, it should be nice and even all
the way around.
If not, you can improve it by carefully cutting more away with the
setting burrs until it fits perfectly, with even metal all the way
around.
For setting, I set the piece in a thermo-plastic called Thermo-loc
(although there are others on the market). This keeps things nice
and still for setting. When rock solid, I place the stone in the
setting and close the bezel a little at a time using a flat-faced
bezel pusher and chasing hammer (with GENTLE persuasion) - using the
12, 6, 3, 9 method. Keep going round until the whole bezel is folded
onto the stone. I then use the same tools in a sideways motion so as
to burnish the metal and smooth out any tool marks. Use a jeweller’s
loupe to see if the bezel is completely turned over and make amends
if it’s not. I then use a fine rubber/pumice wheel to remove any
stubborn tool marks and then polish. I also run a fine burnisher (a
kind gift from a fellow Orchid member!) around the inside edge of
the bezel as the last step to give a lovely shine.
How are you currently making your bezels? What gauge of metal are
you using and are you using faceted or cabochon stones? My above
method is what I use for faceted stones. For cabochons, which are
often opaque, I make a backplate for the stone to sit on, soldering
the bezel onto it. I use the sandpaper and figure of eight method to
level and sand the top edge, making it really neat before setting
the stone - and then if you’re really careful when setting, it will
still be nice and neat afterwards. If the cabochon is transparent, I
make an open-backed setting with a bearer, similar to that for a
faceted stone but I leave the top edge of the bearer flat rather than
cutting a seat, so that it fits the cabochon’s flat back.
I have found that the less I mess with the sheet metal, whilst
constructing the bezel, the neater the outcome. Concentrate on
making a bezel with lovely straight, vertical sides, sand the top
and bottom edges flat and level and take care not to marr it in any
way, so as to retain that crispness. Cut the seat for the stone as
neatly as you can, taking care not to damage the inside, top edge of
the setting that you’ve sanded and filed and with practice, you’ll
end up with really neat bezels, with an even amount of metal to turn
over onto the stone. Incidentally, if I do ever put a small dinge in
the metal accidentally, I go back to the figure of eight and
sandpaper method to remove it and restore that lovely crisp top and
if necessary adjust the seat with the burrs again. As long as any
dinges and adjustments are small, there should be no discernible
difference in bezel height from what it was before.
What are the punches called? I will look in to them if they can
help with getting a constant fold over.
They won’t help with getting a constant fold over. Only thorough
preparation will ensure that unfortunately. I have found them to be
less than useless, as have some others, whilst other people really
like them. I bought mine from Cousins:
http://www.cousinsuk.com/catalog/6/1110/1674.aspx
It’s the second one down, product code B19165 and costs UKP 27.50
UKP
Cookson’s also sell what appears to be the same set:
http://tinyurl.com/6nqm7j and costs UKP 83.66!!!
Good luck with them if you decide to buy them, but only you can
solve the problems you’re experiencing, not the punches. Where are
you in the UK? I’m in Preston.
Helen
UK
http://www.hillsgems.co.uk
http://helensgems.ganoksin.com/blogs/