Manganese Saturate Crystalline Glazes
#4 Recipe & Schedule
Fisker Bronze
Custer Feldspar............. 57.000
Alberta Slip................ 7.000
Sil-co-sil.................. 2.500
F-4 Feldspar................ 1.500
Calcium Carbonate........... 0.500
Dolomite.................... 0.500
OM #4 Ball Clay............. 2.000
MnO......................... 23.000
Copper Carbonate............ 5.500
Iron Oxide Red.............. 0.500
=========
100.000
Oxide Formula Analysis Molar%
CaO 0.043* 1.129%w 1.376%m
MgO 0.019* 0.348%w 0.590%m
K2O 0.143* 6.237%w 4.528%m
Na2O 0.071* 2.052%w 2.264%m
P2O5 0.000* 0.007%w 0.003%m
TiO2 0.001 0.055%w 0.047%m
Al2O3 0.252 11.952%w 8.013%m
SiO2 1.783 49.756%w 56.619%m
CuO 0.099 3.670%w 3.156%m
Fe2O3 0.013 0.955%w 0.408%m
MnO 0.724* 23.839%w 22.995%m
Cost: 0.273
Calculated LOI: 3.521
Imposed LOI:
Si:Al: 7.066
SiB:Al: 7.066
Thermal Expansion: 6.848
Fired in Blaauw Reduction Schedule (in Celcius):
time_temp 00:00 5
time_temp 00:54 140
time_temp 01:12 260
time_temp 01:10 550
time_temp 00:30 600
time_temp 01:12 900
oxidation 83
time_temp 00:45 900
oxidation 93
time_temp 03:06 1210
oxidation 98
time_temp 01:24 1270
cooling
time_temp 02:15 1000
time_temp 01:00 900
time_temp 02:00 500
time_temp 01:00 300
time_temp 02:30 50
time_temp 04:00 50
#5 Recipe & Schedule
Nepheline Syenite........... 65.500
MnO......................... 22.000
Silica...................... 12.500
=========
100.000
Oxide Formula Analysis Molar%
CaO 0.018* 0.465%w 0.559%m
MgO 0.004* 0.067%w 0.112%m
K2O 0.071* 3.036%w 2.175%m
Na2O 0.228* 6.461%w 7.033%m
Al2O3 0.330 15.361%w 10.163%m
SiO2 1.913 52.523%w 58.975%m
Fe2O3 0.001 0.072%w 0.030%m
MnO 0.680* 22.014%w 20.953%m
Cost: 0.312
Calculated LOI: 0.065
Imposed LOI:
Si:Al: 5.803
SiB:Al: 5.803
Thermal Expansion: 7.492
Formula Weight: 218.874
Strike Reduction Hold Firing Schedule
in Small Test Gas Kiln in F
3:30 -> 1500F (^012)
Body Reduction
1:00 -> 1700F (^04)
Adjust to Moderate reduction, fast climb
3:30 -> 2300F (^9 flat, ^10 down)
Crash Cool
0:15 -> 1840F
Cut secondary air, minimize primary air, damp in, gas low to strong reduction and stalled holding temp
3:00 -> 1840F (Hold)
Off, Natural Cool
6:00 -> 300F
#6 Recipe & Firing Schedule
Custer Feldspar............. 69.000
OM #4 Ball Clay............. 1.500
MnO......................... 27.500
Granular Manganese.......... 2.000
=========
100.000
Oxide Formula Analysis Molar%
CaO 0.007* 0.210%w 0.256%m
MgO 0.000* 0.006%w 0.010%m
K2O 0.140* 6.961%w 5.057%m
Na2O 0.064* 2.091%w 2.308%m
TiO2 0.000 0.018%w 0.016%m
Al2O3 0.226 12.223%w 8.201%m
SiO2 1.533 48.751%w 55.512%m
Fe2O3 0.001 0.123%w 0.053%m
MnO 0.789* 29.617%w 28.588%m
Cost: 0.297
Calculated LOI:
Imposed LOI:
Si:Al: 6.769
SiB:Al: 6.769
Thermal Expansion: 7.120
Fired in Blaauw Reduction Schedule (in Celcius): time_temp 00:00 5 time_temp 00:54 140 time_temp 01:12 260 time_temp 01:10 550 time_temp 00:30 600 time_temp 01:12 900 oxidation 83 time_temp 00:45 900 oxidation 93 time_temp 03:06 1210 oxidation 98 time_temp 01:24 1270 cooling time_temp 02:15 1000 time_temp 01:00 900 time_temp 02:00 500 time_temp 01:00 300 time_temp 02:30 50 time_temp 04:00 50
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Ceramic Action 
thanks from France
yann
Matt, Keep up the good research!
I agree, thanks for sharing your recipes!
Thanks Matt great reading all the work you are doing .Have you tried firing electric for these glazes
Thank you! I haven’t tried electric because I don’t really have the opportunity. Gas is cheaper here and our electric kilns take a beating as it is. They’d work just fine with some beefy elements and efficient insulation.
New…looking for glazes…really like your colors…are they difficult to apply…what is your application?