Quad Elements last longer at high fire
Precise Firing with a Cone 12 Kiln
Fast heat up & cool down to control crystals
1) Genesis Touch Screen Control with a free app for easy programming and monitoring with Zone Control for even heating
2) Hard Ceramic Element Channels protect elements and fragile firebrick, improves kiln life dramatically
3) Quad Element System for long element life
4) The Control Panel makes servicing easy and safe and keeps electronics cool
5) Ceramic Terminals make changing elements easy without crimping
6) Type S Platinum Thermocouples
7) Solid Ceramic Peephole Plug - no chance of falling out (not shown in photo)
8) Stainless Steel Case
9) Full Support Stand extends the life of the bottom brick
10) K25 high-temperature brick
11) Cone 12 (2400 Deg F, 1315 Deg C)
12) Extra power for fast heat-up
Why Crystalline Glaze Firing Requires Specialized Kilns
Crystalline glaze firing is one of ceramics' most demanding and precise processes. Unlike standard glaze firing, it requires carefully controlled firing schedules, including extended temperature holds and highly controlled cooling cycles, to promote crystal growth. Without this precise control, the desired crystal patterns will not form, or results will be inconsistent and disappointing.
Temperature Precision Is Critical
Crystals form at very specific temperature ranges. Small fluctuations can dramatically affect their size, shape, and clarity. Specialized kilns like the L&L JH Crystalline Series offer advanced digital controllers capable of executing complex, multi-step firing programs with exact temperature holds and slow, controlled cooling ramps essential for crystal development.
Extended High-Temperature Holds
Crystalline glazes typically require long hold times at high temperatures (often above cone 10 or 2300°F) to allow crystals to nucleate and grow. Many standard kilns aren’t designed to maintain these extended holds without stressing components. L&L’s kilns feature heavy-duty construction and element support systems that meet these demanding conditions.
Controlled Cooling Cycles for Crystal Growth
The size and beauty of the crystals depend heavily on the cooling cycle. Faster cooling results in smaller crystals, while slow, carefully managed cooling encourages larger, more dramatic formations. Specialized kilns with programmable controllers allow artists to fine-tune these cooling phases to achieve their desired artistic effects.
Durability and Easy Maintenance for Repeated High-Temperature Use
Crystalline firing is hard on kiln components. Frequent repairs and downtime can become a problem without reinforced construction and easy-to-maintain designs. L&L’s exclusive ceramic element holders and rugged materials make replacing elements and maintaining the kiln easy, ensuring reliable operation for repeated high-temperature crystalline firings.
Read about the History of the JH Kilns and see some great artists
