The chemical brightening (bombing) plants provide a chemical brightening process for goldsmith manufactured pieces through a reaction between hydrogen peroxide (H2O2) and potassium cyanide (KCN).

The reaction takes place under a fume hood and in complete security.

The unit is designed and manufactured to meet the various production needs: the reactor is suitable for processing both small and big batches.

The plant is equipped with a storage tank with filtration system for the effluents that allow to gather the liquids for a later recovery of the precious metals dissolved in solution.


  • Versatile (allows the processing of gold and silver alloys);
  • Safe;
  • Minimal precious metals removal;
  • Precious metals recovery at a later step;
Model BT-CHBR-01
Reactor capacity 400 L
Cabinet dimensions [mm] 1.200 x 800 x 1.800
Storage tank for exhausted liquids dimensions liquidi [mm] 750 x 750 x 1.200 h
Power supply 400 V – 50 Hz
Power 8 kW

Check local regulation regarding the handling and use of toxic chemicals.

Check out how to recover precious metals from the exhausted waters!

Chemical brightening plant - bombing

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Balestri Technologies S.r.l.
Via Aldo Moro, 9 - 52010
Capolona (AR) Italy
Tel. +39.0575.420.673
Tel./Fax. +39.0575.420.100
Partita IVA: 02120540519
Num. REA: AR 163232
Capitale sociale I.V.: € 10.000,00
Socio unico: NO