Brass ear wires?
Brass, along with bronze and other copper based alloys has been used
in jewellery predominantly in Africa for many centuries.
It seemed to work because the holes in the ear lobes were 1/4in or
larger, so lots of air and washing can get to to the hole to remove
salts from perspiration.
However in the western world the ear holes are generally only 1/32nd
in size so the risk of irritation from the reaction between
perspiration and the base metal is much greater. Youll soon have lots
of customers asking for their money back.
Also, the difference in cost of a brass ear wire to a silver one is
Apart from the problem you will have that the brass jewellery will
look terrible in a very short time, unless you have it properly gold
or silver plated.
How many sets of ear jewellery do you sell in say a week? If its
dozens, then it would be worth investing in a flash butt welder. this
will enable you to use any ear wire you want,joining it to any
jewellery you make.
Otherwise use your normal technique for soldering, this will work on
brass, copper, stainless steel, tho the latter will need a reactive
flux. Same solder as normal.
Why havnt you experimented? its so easy to run a few simple trials.