I agree with the fact of starting with pure metals. The best alloy’s
are made by using "known"pure as possible metals. Why should one mix
9 or 10 karat gold with pure precious metal in order to become a
higher karat alloy of unknown purity and consistence?
If been in there, don that, had the same thoughts of raising low
karat gold, but on the if you take al the effort and materials in
account, then you realize that you are losing time and money in this
lower karat range. For this reason, I just collect this gold and have
it refined. Yes I have to pay for it but I’m 100 procent sure of
starting with clean metals, serving my customers with the best
quality possible for my standards.
However, for those fellow jewellers who are in the position of
raising the lower karat gold to higher, having all the materials
(acids, mixture powder, crucibles and others), time and knowledge,
please go a head and have fun. I like to go with simple and straight
forward metals which allows me to end up with a consistent color and
no “what in the hell is wrong with this stuf” moments.
Best regards and keep the standards high -)