What Is Slump Molding

Slump molds are concave forms that work just like other molds in that clay is draped over the surface of the mold. With slump molds, the inside surface of a pot is exposed, while the outer face is in contact with the mold.

How is a slump mold used?

Slump molds allow you to shape the rim and/or add handles. Drape clay OVER a Hump mold. Hump molds allow you to add a foot.

What is a slump mold and how is it used?

Slump Molds – The clay “Slumps” or sags down creating a concave shape and are used when you want to add embellishments to the inside of the shape or around the lip.

What is a drape or slump mold?

Drape molds are molds or forms (usually of plaster) that is used to shape materials such as glass, clay, wax, etc. In hump molds, the shaping is done by draping slabs of the material to be shaped over the mold/hump. On the other, in a slump mold, the material is slumped into the mold.

What are slump molds made of?

Slump mold definition: A typically shallow frame or mold into which a slab of clay is allowed to fall or settle in order to form a vessel. These can be frames with no bottom, as in today’s video clip. Hump mold definition: A convex form over which clay slabs are draped until stiff enough to hold the shape.

What is a slump Bowl?

Slump Molding Bowls, plates, and platters can easily be made by slumping a slab into an existing bowl or plate. Deep bowls will require the slab to be cut, removing excess clay, in order to form smoothly into the mold. Another method would be to piece several different slabs into the mold to complete the form.

What is sgraffito technique?

Sgraffito, (Italian: “scratched”), in the visual arts, a technique used in painting, pottery, and glass, which consists of putting down a preliminary surface, covering it with another, and then scratching the superficial layer in such a way that the pattern or shape that emerges is of the lower colour.

What is slump ceramics?

Slumping is a technique in which items are made in a kiln by means of shaping glass over molds at high temperatures. The slumping of a pyrometric cone is often used to measure temperature in a kiln.

What is a slump mold in pottery?

Slump molds are concave forms that work just like other molds in that clay is draped over the surface of the mold. With slump molds, the inside surface of a pot is exposed, while the outer face is in contact with the mold.

What is the difference between a slump mold and a drape mold?

Convex plaster forms are known as “hump molds” or “drape molds”, while concave plaster forms are known as “slump molds”. The difference between a hump mold and a drape mold is the degree of slope of the shape with the drape mold having a shallower slope than hump molds.

What is a press mold?

: a cast-iron mold used in glassmaking.

What is a glass slump mold?

Glass slumping is a process that uses gravity and heat from a kiln to shape sheet glass using a mold. The slumping process is commonly used to create bowls, platters, and art glass. In the glass slumping process, the sheet glass is laid over a mold and put in a kiln up to 1300 degrees Fahrenheit.

Can you slump stained glass?

Just About any glass can be fused or slumped, However I would do a test piece on each one before hand, and also not all stained glass looks good slumped, meaning that the color in some can turn on you so remember that testig is good.

What are the stages of greenware?

Greenware is unfired clay pottery referring to a stage of production when the clay is mostly dry (leather hard) but has not yet been fired in a kiln. Greenware may be in any of the stages of drying: wet, damp, soft leather-hard, leather-hard, stiff leather-hard, dry, and bone dry.

What does underglaze mean in ceramics?

Underglaze is a method of decorating pottery in which painted decoration is applied to the surface before it is covered with a transparent ceramic glaze and fired in a kiln. Underglaze decoration uses pigments derived from oxides which fuse with the glaze when the piece is fired in a kiln.

What are the stages of clay?

There are 6 essential stages of clay: 1. ) Slip. Slip is clay with added water to make it into a paste or liquid. 2.) Wet clay. Wet clay is used by many potters to produce their work. 3.) Leather-hard clay. 4.) Dry clay. 5.) Bisque. 6.) Glaze ware.

What is Mishima technique?

Mishima is a technique of inlaying slip, underglaze, or even clay into a contrasting clay body, the main clay body of the pottery piece. This technique allows for extremely fine, intricate design work with hard, sharp edges that can be difficult to reliably replicate in any other way.

What tools are used for sgraffito?

The Best Sgraffito Tools for Experimentations in Sculpture Kemper Tools WLS Double Ended Wire Loop Sgraffito. Jack Richeson Wire Loop Sgraffito. SE 12-Piece Stainless Steel Wax Carvers Set. HTS Stainless Steel Hollow Tip Carver Wax & Clay Sculpting Tool Set. Xiem Studio Tools Ultimate Tools for Clay Artists.

Can you sgraffito Bisqueware?

Making sgraffito pottery involves scratching through a top decorative layer to expose the underlying clay body. The decorative layer can be underglaze, slip, or engobe. However, the sgraffito technique can be used on bisqueware too.

What does Chuck mean in ceramics?

Ceramic – Pottery Dictionary Chuck is clay made into a shape to hold a pot or bowl in place when upside down on a wheel, so as to be able to finish off the back and footing. The clay of the chuck should be cheese-hard, dry enough not to change its shape when working with it or it can be fired for continual use.

What is wax resist used for in ceramics?

Wax Resist is a waxy substance used to prevent slips, engobes, or glazes from adhering onto the clay body or a prior coating of slip, etc.

What are the 4 hand building techniques of clay?

The most common handbuilding techniques are pinch pottery, coil building, and slab building.

What is coil pottery?

: a pottery common among American Indians made by building up sides of pots with successive rolls of clay.