With slumping we lower a piece of flat glass into a mold. The glass is heated in the oven until it softens and begins to deform. It sinks into the mold under its own weight and takes the shape of the mold. Forming glass over a mold is called draping.

With slumping we use molds. Usually a mold is made of a mixture of plaster, quartz and water (possibly chamotte as well). Molds can be reinforced with fiberglass or wire. You can make a mold with us under the guidance of an advisor. We have all materials in stock for this.

Result of slumping glass

Molds of ceramic or RVS can also be used with slumping. You need to provide these molds yourself. We use release agents on ceramic and metal molds to ensure that the glass does not stick during heating.

Glass types
We prefer to use Bullseye glass; this is the only brand that has different colors that are compatible. For casting we sometimes use Banas glass as well. This glass is not compatible and the glass you use should therefore come from the same batch. It is possible to use your own glass, but we cannot guarantee the result.

Prior to your project, discuss the timeline with one of our advisors. We do not have glass in stock. We place orders for glass per project. Take into account a delivery time that can increase depending on how common the glass is (less common = longer delivery time).

Time indications

Slumping or draping incl. loading and unloading oven 2 days on average

We would love to meet you, to see what we can do for you and your project. If we can help you, we will discuss your process further. With slumping we start from a mold. A mold of plaster and quartz can be made in our workshop. Molds of ceramic or RVS can also be used. You need to provide these molds yourself.

Make us meet

To see the up-to-date prices for the use of our workshop, please download the price lists. Prices for materials (plaster, quartz and glass) can be requested at the workshop. An indication of the price of glass: Bullseye Crystal Clear cullet’s costs about € 15 per kg. The specific gravity of glass is 2.5 kg / liter.