Notes about Celadon
Although I am no glaze expert, overlooking these celadon glazes it is obvious what materials are used within them. A few things to note when developing your own celadon or altering another recipe is that I find grolleg when used as the clay produces a bluer tone compared to epk and other clays.
One other important thing to note is the difference in Feldspars. Most of these glaze use Custer Feldspar which works well with the recipe. However It can run when mixed with other glazes and should be taken into consideration. The Minspar 200 however appears to be a much more stable feldspar and I have seen it used in more pure blues (not certain that it produces a bluer tone just something I noted). A few things to support this are my clay body which uses a fair amount of custer feldspar however does tend to slump and warp whereas a friend of mines body which uses minispar 200 does not do either really. Also every celadon I have used such as the IUS Celadon will get thick and run when mixed with certain glazes whereas the Pale Blue Celadon which utilizes the Minispar 200 does not, however it does not blend well with other glazes alone.
1-2-3-4 Celadon Percentage
-Epk…………………………………..10
-whiting……………………………..20
-Silica…………………………………30
-Custer Feldspar………………….40
Add:
-Yellow Ochre……………………….2
-Bentonite…………………………….2
Icy Blue Celadon Percentage
-Barium Carbonate……………………………4.55
-Whiting…………………………………………..12.86
-Custer Feldspar……………………………….50.15
-Silica………………………………………………32.44
-Bentonite………………………………………..2
-Black Iron Oxide……………………………..1
Notes:
Can get foggy and semi opaque when applied to thick.
Ius Celadon
-Custer Feldspar………………………………..30.45
-Om#4 Ball Clay………………………………..6.88
-Epk…………………………………………………11.98
-Talc…………………………………………………3.33
-Whiting…………………………………………..17.01
-Flint………………………………………………..30.36
Add:
-Red Iron Oxide…………………………………1
-Bentonite…………………………………………1
-Epsom Salt……………………………………… (.15)
Notes:
Very reliable green celadon, can run if t0o thick and mixed with other glazes.
Pale Blue Celadon
-Minispar 200………………………………….32.6
-Whiting………………………………………….20.2
-Grolleg……………………………………………15.
-Silica………………………………………………32.2
Add:
-Yellow Ochre…………………………………..4
-Bentonite………………………………………..2
Notes:
Very stable and reliable blue. Apply Thick.
Amber Celadon Percentage
-Albany Slip…………………………………35.87
-Wollastonite……………………………….14.13
-Epk……………………………………………3.26
-Gerstley Borate…………………………..3.26
-Whiting……………………………………..7.61
-Flint………………………………………….14.13
-Custer Feldspar………………………….21.74
Add:
-Yellow Ochre……………………………..8.70
Apple Green Celadon (Tom Coleman)
-Whiting…………………………………….17.95
-Potash Feldspar………………………..43.59
-Epk………………………………………….10.26
-Flint…………………………………………28.20
Add:
-Chrome Oxide………………………….. (.25)
-Red Iron Oxide………………………… (.77)
Notes:
Very intense Bright green
Schulman Pale Blue Celadon Batch Percentage
-Barium Carbonate…………………………196
-Bone Ashe…………………………………….196
-Whiting………………………………………..1765
-Cornwall Stone……………………………..2157
-Minispar 200………………………………..882
-Epk……………………………………………..1667
-Flint…………………………………………….3137
Add:
-Tine Oxide…………………………………..196
-Red Iron Oxide…………………………….150
-Bentonite…………………………………….147
Notes:
This is a batch mix not normal percentages, Add bentonite after separately in a cup of water soaked for a few hours or overnight.
Korean Celadon Percentage
-Custer Feldspar………………………………26
-Whiting………………………………………….26
-Epk………………………………………………..7
-Om-4……………………………………………..21
-Silica………………………………………………21
Add:
-Yellow Ochre………………………………….4
-Bentonite……………………………………….2
Notes:
Darker olive green, apply thick
Korean Pale Celadon
-Custer Feldspar…………………………….26
-Whiting……………………………………….26
-Epk……………………………………………..7
-Om-4 Ball Clay…………………………….21
-Silica…………………………………………..21
Add:
-Black Iron Oxide………………………… (.5)
-Bentonite……………………………………2
Notes:
Brighter, Light green color, Apply thick.
Amber Celadon Percentage
-Albany Slip………………………..33
-Wollastonite………………………13
-Epk…………………………………..3
-Gerstley Borate………………….3
-Whiting…………………………….7
-Silica………………………………..13
-Custer Feldspar…………………20
-Yellow Ochre…………………….7
-Bentonite………………………..2
David Leach Celadon (Jennifer Allen)
-Cornwall…………………………..25
-Grolleg…………………………….25
-Whiting……………………………25
-Flint………………………………..25
Add:
-For blue add Spanish red iron oxide 0.5%
-For apple green add Victoria green mason stain 1%
-Try 600 mesh flint if 325 mesh crazes t0o much.