Caldera-X Blank Collar The Caldera-X collar is a kiln section that stacks onto the Caldera or Caldera-S kiln, adding 4 ½” of height. The Caldera-X has no heating elements. It is designed to add extra space for low-fire projects such as glass slumping. The Caldera and Caldera-S, even with a collar, still fire to 2000°F/1093°C. The Collar is made of 2 ½” hand-selected insulating refractory firebricks.
To strengthen the firing chamber, the firebrick corners are fitted together with L-shaped notches. This type of joint lasts longer than the butted joint and the "picture frame" mitered joint found on competitive brands. Rugged construction makes this collar a workhorse. The insulating firebricks, wrapped in heavy-gauge stainless steel, soak up heat for slow, efficient cooling. For each maintenance, the stainless steel case includes case tighteners.
Imagine the glass you could make with this kiln: Sag, slump, and fuse. Make small bowls, pendants, earrings, cufflinks, and even bracelets. Enjoy the glittering beauty of dichroics. This kiln will give you a haven of creative enjoyment that you will especially appreciate when life gets hectic. The Caldera-X is made in America to exacting standards.
The Caldera-X can ship by UPS. Enjoy lower shipping cost and faster service. Specially designed cartons and foam padding assure that the kiln will arrive safely to your doorstep.
Warning for the Caldera Kiln Equipped with a Lid Safety Switch and Collar
The Caldera kiln was intended to be a stackable kiln with a separate lid and bottom. However, the lid must be hinged to the Caldera body when a lid safety switch is installed. To stabilize a Caldera kiln that has a hinged lid, we attach the kiln body and kiln bottom together with two latches.
If an unlatched collar (enameling, bead, or extension) is mounted between the Caldera body and the kiln bottom, care must be taken when opening the hinged lid. Do not open the lid past 90 degrees (where the lid is straight up) unless the lid leans against a heat-proof support behind the kiln.