A series of fine metal powders (200-325 mesh) specially for use with resins in the Cold Cast Resin Metal Process originally developed by Alec Tiranti Ltd in the late fifties.
The powders are pure metals, not colours, and are unsuitable for painting. Please note that we cannot guarantee colours, and that enough should be in hand of the same shade for the whole job in hand.
The metal powder is mixed with GP or Multi-Purpose Resin, and hardener. This mixture is then painted into the mould as a first layer or gel coat. It is then either filled solid with resin and filler or laminated with glass fibre. When polished to reveal the metal, the castings are almost identical in appearance to a cast piece in the chosen metal. The metal content of the metal / resin mix should be as high as possible; too little metal filler is as bad as none at all.
Cold Cast Resin Metal pieces in bronze, brass or copper can be patinated using Antiquing Fluids or Cupra.
Quantities of Fillers: In general, a rule of thumb is equal parts by volume plus a little more filler (based on GP or Multi-Purpose resin at room temperature).
A guide to weight ratios of metal fillers to one part of Multi-Purpose resin is:
Bronze: 6 or 7
Brass: 5 or 6
Copper: 4 or 5
Iron: 6 or 7