Barranca Diamond SUPER CABMAKER-GP8 - Manual (Page 18)

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Once the majority of coarse saw and grinding marks have been sanded
off with the 70 grit electroplated pad, the user can replace the 70 grit pad
with the 120 grit electroplated pad and repeat the process to sand flat all
visible saw or grinding marks or uneven surfaces. Dry off gemstone and
inspect closely.
Upon satisfactory sanding of the gemstone with 70 and 120 grit 7" elec-
troplated discs, mount the red 220 grit 7" resin diamond polishing pad
centered flat aluminum disc and proceed to polishing the gemstone
across the lower face of the pad inspecting the face surface frequently
(Fig 23). Progress through the 400, 800, 1,800, 3,500, and 8,500 grit 7"
resin diamond polishing pads, making sure to closely inspect the gem-
stone surface closely before proceeding to the next finer (higher num-
bered sequence) resin diamond pads. In some cases, stubborn scratch-
es or uneven portions of the gemstone face being worked will need to be
polished with a lower (coarser) grit resin diamond pad therefore the user
is advised to closely inspect the face of his gemstone dry and to retreat
back a grit size or lower if necessary. Never skip a grit size when polish-
ing.
Fig 20 - Sanding gemstone
Fig 21 - Polishing pad centered on
flat aluminum disc
POLISHING WITH THE LEATHER BUFF PAD
For final polished gemstone results, place the 8" cowhide leather pad (rough side out) on the foam polishing
end disc using the 3M On/Off adhesive (red box) to hold the leather pad securely while buffing the gemstone in
a rocking motion (Figs 22 & 23). Only use a small amount (8 to 10 dabs) of 3M On/Off adhesive on the smooth
cowhide surface, smearing it uniformly before placing it over the foam rubber on the polishing disc. When the
final polish finish of your gemstone
has been achieved, remove the
leather disc and place it in a zip-lock
bag to protect it for future use. It is
not necessary to use any polishing
media or liquid (water) when buffing
the gemstone with the leather disc.
Be sure to firmly grip the gemstone
by hand or with a dop-stick (wood
dowel or aluminum rod) cemented or
epoxied to the back of the gemstone
while using the leather buff pad.
Fig 22 Fig 23
SUPER CABMAKER GP8 OPERATION AND ADJUSTMENT