New Pots, New Recipes

#6, #5, #4
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

2013 AIR Exhibition Gallery Tour

Rutile, Ilmenite Variations of 1234 Base

1-10

Rutile 6, Red Iron 3

Ilmenite 2%, Red Iron 5%

Black Iron 5, Rutile 4%

Black Iron 5, Rutile 4%

Yellow Iron 5, Rutile 4%

Yellow Iron 5, Rutile 4%

Red Iron Oxide 5, Granular Ilmenite 1

Mason Stain 6601 5, Rutile 4, Tin 1

Burnt Umber 5, Rutile 4

Burnt Umber 5, Rutile 4

Redart 12, Rutile 4

Alberta 12, Rutile 4

Lizella 12, Rutile 4

Tenmoku Test Tiles – Iron, Rutile, Ilmenite, Earthenware Variants

In an efferot to further explore the different variations of Iron Oxide, Ilmenite, and Rutile – I’ve run a series of tests substituting Red Iron Oxide, for other oxides available in my lab. It was a pretty good series, although on some of the oxides, I overshot the ideal % and on a few I think it could be more.

Notice the 12% addition of Earthenware clays in 8,9, and 10 produce some pretty nice Celadon glazes!

MT Series

ilmenite 1%

ilmenite 1%, Rutile 2%, Tin 2%

Black Iron Oxide 10%

Yellow Iron Oxide 10%

(Control) Red Iron Oxide 10%

Mason Stain 6601 10%

Burnt Umber 12%

12% Redart

12% Alberta

Fisker’s West Palm Ash

Here’s an interesting glaze inspired by a locally abundant material – dead palm fronds. Every week  throughout South Florida the streets fill up with piles of dead vegetation from people pruning their trees and plants.  With a 12 month growing cycle, they’re EVERYWHERE.

To utilize this stuff, I started by collecting about a half of a pickup truck’s worth of dead palm fronds. Collecting all of this stuff took about 10 minutes, and I didn’t have to go very far. I then setup a perforated burn barrel with a grated floor. I burned down everything, and collected the ash in a tray under the barrel.  Once I collected the ash, I added it all to a 5 gallon bucket and ‘washed’ it, by dumping out the top layer of chunks and oily looking stuff. I  gave it 24 hours, and came back out and stirred it, and repeated for the next few days. Fin ally, I poured the mix through a 40 mesh sieve into a bisque drying platter and let the stuff dry out. After that I crushed it into a powder and pushed it through an 80m sieve. Quite a bit of work, but a truly unique material.

Fisker’s West Palm Ash Glaze

Given that the soil here in Florida has so much Silica by virtue of all the sand it contains, I had the thought that its be likely that palm tree ash would have a much higher % of silica than say, hardwood ash.  I haven’t had it tested for the side-by-side chemical composition, but my initial tests seem very promising. My next step is to dredge up some clay-like muck from the canal across the street, and mix in calcined seashells for good measure. If the canal silt doesn’t do the trick, I’ll try some clay/silt from the Intracoastal waterway (A brackish salt/freshwater channel that runs parallel to the ocean, inter-connected by inlets and canals – which ultimately  keeps South Florida from turning back into a swamp!)

Nontheless, the 3 tiles on the left were soda fired. The 2 on the right were Reduction fired to cone 10/11.  The clays from left to right are; Studio Reclaim (A bastard mix of everything), B-Mix, 550 Porcelain, Studio Mix, Porcelain. The recipe is as follows:

Fisker’s West Palm Ash

Unwashed, 80m Palm Ash 45

Nepheline Syenite 45

Redart Earthenware 10