Deep, Clear Glassy results using Casting Rocks
Casting rocks are unannealed random shapes between the sizes of grapes and baseballs. They are a low cost source of premium formula casting glass. If your casting does not need the low bubble count and uniform shape of Casting Billets, choose Casting Rocks as an economical alternative. Each container has a variety of piece sizes, so you can pick the size and weight you need to fit any mold.
While we make a big effort to maintain consistent color from run to run over many years, the extremely light colors in casting products are prone to some variation. This is most evident in large castings with simple coloration, or in very thick castings (2" plus), and more so for installations in front of a simple white background.
If there are multiple colors in a single piece, or if the piece is to be displayed in a busy or colorful environment, it is highly unlikely that slight color variations in the light casting colors will be noticeable even to the trained eye. So, if you are planning a large single color or very thick cast project, please request that your casting glass come from a single production day or lot.
Questions about firing schedules? When planning a firing schedule for heavier castings, please refer to our Firing Guidelines. You will find that System 96 casting products can be fired at slightly lower temperatures than 90 COE ‘Bullseye Compatible’ or Artista fusible glass products, so you save on firing costs.