Fleezy Clouds
The glass is supposed to resemble little altocumulus clouds in layers passing over the ocean. Kind of like what the ocean might look like seen from space. The transparency of the glass is used to create depth and an apparent 3D-effect through the clouds.
Multiple layers of glass in different colors are burned in a specific way to release the bright glass, which then works its way through the layers to the surface and form clouds. The shadows and nuances appear as the colors chemically don’t mix well together.
Beforehand, the glass is burned with water and crazed to make it more fragile for the next burning.
The first challenge is to balance the colors – and thereby the chemistry – to avoid it becoming one big grey and ugly splotch.
The next challenge is to control the fusion by being extremely precis with the temperature and duration, as the glass only gets its beautiful expression inbetween a very small spectrum.