Glass Casting is the process in which glass objects are cast by directing molten glass into a mould where it solidifies. The technique has been used since the Egyptian period. Modern cast glass is formed by a variety of processes such as fusing and kilncasting, or casting into sand, graphite or metal moulds.

  • Direct Casting/Hot Casting - Pouring fully molten glass into a mould, usually from a furnace.
  • Billet Casting - Melting glass billet into a kiln washed mold and heating in a kiln until the glass flows and fills the mould.  Once filled the glass is soaked and annealed to cool over the course of days.
  • Lost Wax Casting - A pattern is made from wax and a refractory mould is formed around that wax.  The wax is then melted out of the cavity and the cavity is filled with molten glass and annealed inside of a kiln.
  • Fused Sheet - Large slabs can be achieved with an even bubble pattern thru the process of fusing sheets together in a kiln.  Sheets are stacked and fired until they have merged into one slab.  

West Supply LLC. Kiln Casting Parameters

Largest kiln bed space: 46” depth x 88” width x 11” tall

Tallest kiln space: 26” tall x 36” depth x 48” width





As they are comprised of stacked glass sheets, our Fused Glass slabs are limited in size by the size of sheets we source art glass in.

Typically clear sheets are 40”x80”x6mm (1/4”)

Sheets are crystal clear. If color is desired we offer a spray-lacquer option, which is applied to the bottom surface. This can be opaque or transparent. Ask for color options.

Signature champagne bubbles throughout each piece.  Typically there is a smooth or coarse refractory bottom surface texture, but this can be hand ground and polished away as an additional service.

Standard textures on the bottom can be smooth paper, coarse paper, or polished. Sides must be polished due to the water-jet cutting process.  Generally slabs are water jet cut to size. With water jetting, we must allow for minimum 1/2” all around to be cut off. This will add at least 1” of material to any specs to accommodate water jet needs.


Slabs are limited by size of kiln

Billets are a unit of glass in casting. They are approximately 3.5 lbs and 5”x10”x0.75” thick. We stack the appropriately weighed quantity within a mould and allow them to flow into one another. Because we are loading them in to flow together we can cast a larger piece than with sheet glass.

We can only offer billet-cast pieces up to 44”x86”. The same rule applies for water jetting dimensions. The piece must fit within a 46”x88” slab with room to cut off 1” on either side. Thickness is generally limited more by process time than kiln dimension.

We can offer a range of colors as the billets are made in several shades.

Spray-lacquer is also an option for custom color.

Bubble content can vary from very low to galactic.

Standard textures on the bottom can be smooth paper, coarse paper, or polished. Sides must be polished due to the water jet process.

We can discuss custom texture options. Plaster-silica moulds allow for a wider variety of texturing.

 Billet Cast "Galaxy" Bubble Fields

Billet Cast "Galaxy" Bubble Fields