Fusion Frit FZ-557

Alternate Names: Fusion Frit FZ557

Description: Fast fire transparent zinc frit

Oxide	Analysis	Formula
BaO	0.80%	0.01
CaO	11.00%	0.43
K2O	4.70%	0.11
MgO	2.50%	0.14
Na2O	0.30%	0.01
ZnO	11.00%	0.30
B2O3	4.50%	0.14
Al2O3	5.50%	0.12
SiO2	59.70%	2.19
Oxide Weight		220.65
Formula Weight		220.65

Related Information

Various frits fired at 1950F

These sixteen GBMF test balls have melted down onto a slab of grogged clay. Kiln fired at 108F/hr for the last 100 degrees F and held for 15 minutes. This demonstrates the comparison value of this test and how various frits compare in their melting character.

Frits fired to 2050F

These are higher temperature frits. 10 gram balls were melted on to this tile.

Various frits fired at 1850F

16 GBMF tests on a slab of grogged clay. Kiln fired at 108F/hr for last 100 degrees F and held for 15 minutes.

At 1700F the fast fire frits show an important difference

These were 10g balls melted using our GBMF test, the tile they are being fired on is a grogged stoneware clay. A few of the more interesting ones here are frit 3470 lead zinc, 3185 super high boron, CC257 high barium, FR003 high alkali and F49 and FR001 opacifieds. Notice how early and vigorously some are melting. But notice 557 and 556, they aren’t doing anything - that is not by accident. These are fast-fire frits, they are designed to melt later and more quickly. This is only 1700F, since no one fires this low it makes sense that if a glaze has not started melting it will be able to pass escaping gases of decomposition. This avoids the bubbles and surface defects these cause, as 3185, CC257 and 3470 are already demonstrating. What about FR002, FR002 and 3565, they are melting and look fine? They have higher surface tension and much less contact with the body generating the gases.

Links

Materials	Frit Frits are made by melting mixes of raw materials, quenching the melt in water, grinding the pebbles into a powder. Frits have chemistries raw materials cannot.
Typecodes	Frit A frit is the powdered form a man-made glass. Frits are premelted, then ground to a glass. They have tightly controlled chemistries, they are available for glazes of all types.
Glossary	Fast Fire Glazes Industrial ceramics are fired very quickly and require minimal micro bubbles and zero pinholes and blisters. Fast fire late melting glazes accomplish that.

Data

Co-efficient of Linear Expansion	6.63 x 10-6
Frit Softening Point	1800F

By Tony Hansen
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