Plastic, rice or Styrofoam all should be dry. we must remember
that tumble polishing is a step by step process. if one of the
steps is not absolutely completed ,the next one will never be
perfect. check out your procedure. try Diamond powder. it is fast
. Please find here an old text ihad send to Orchid some time
ago, you may find some hints there. feel free to contact me
U S I N G V I B R A T I N G T U M B L E R
A. THE MEDIA. B. THE POWDERS C. LOGBOOK D. THE MACHINE.
A. THE MEDIA.
Media is the material that used with the stones. it must be the
same hardens as the stone we polish. the best is to use the off
cuts of the same material. for example Amethyst cabs with
Amethyst off cuts.
- the average size of the media must be close to the size of
the stones. 2. if you do various sizes at the same time, you must
use close sizes, e.g. 4x6 5x7 or 8x10 10x12. do not mix size that
are too different like 6x8 with 13x18. the total wight of the
media and the stones should be around 3 kg. the should be around
40% of the total.
the best indication for the polishing action is to see a fast
movement, or quick turning of the media in the machine. if it is
too slow, something is wrong.
- the media is too wet(too much water).
- excessive wieght.
- not enough wieght.
the media should be semi wet, like mud.water should be added
when it gets dry.
when every phase of the process is done, the media should be
washed, and the powder should be kept for the next round.
good news for you!! we use Silicon Carbide or Carborondom(?).
run SC # 220, 25gms for 15 hours. add water when needed.
check the surface of the stone every few hours.
run SC # 360 40 gms for 24 hours. add water.check surface.
run SC # 600 40 GMS for 30 hours . " " " " .
run Diamantine 20 gms 30 hours . " " " " .
rinse with water and light detergent for 1 hour.
the media the stone and the container must be washed carefully
after every run.
THE MOST IMPORTANT THING IS TO KNOW WHEN THE STONE
IS READY FOR THE NEXT PHASE. YOU SHOULD CHECK THE
SURFACE OF THE STONE AND MAKE SURE THAT IT HAS A
UNIFORM TEXTURE! IF SOME PARTS OF THE STONES ARE
DIFFERENT YOU MAY HAVE TO REDO IT.
THE ABOVE NUMBERS WILL CHANGE FROM ONE TYPE OF STONE TO THE OTHER!
THESE NUMBERS ARE GOOD FOR CITRINE, AMETHYST. IF YOU POLISH ANOTHER
TYPE, YOU MUST FIND THE QUANTITIES USING A...
It is very important to keep a logbook of your production!
you should write all the details. hours, weights of powder, wieght
of media, if you do not keep this book, you will have to find the
way every time....if you doing new type of stone, you can compare
each run and make the necessary changes.
D. THE MACHINE
you can change the amplitude of the vibrations by changing the
position of the wieght on the motor axle. for smaller loads,
you need lower amplitude.
Hemi Englisher, GemCal Co.
21/6 Rajple 2 Cha-Am, Petchaburi 76120
Fax # 6632 434015
Tel # 661 4457742