This Raspberry is awesome

H & R RASPBERRY CONE 6  NZ
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

Cone 6    1201 deg.C. - Oxidation      
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

Whiting                             20.00
Nepheline Syenite 200               18.00
Ferro 3134                          14.00
OM-4 Ball Clay                      18.00
Silica                              30.00
Chrome Oxide                         0.20
Tin Oxide                            7.50
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

    Seger              Weight%
KNO      0.198     4.83%
CaO      0.795    16.06%
MgO      0.007     0.10%
Al2O3      0.280    10.29%
B2O3      0.146     3.67%
SiO2      2.992    64.80%
TiO2      0.008     0.24%
K2O      0.034     1.16%
Na2O      0.164     3.67%
Al:Si      10.68  
Expan.       9.53  
ST     354.95  
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

Clay Body        MFW,N21,LF18
Colour        ChromeTin pink
Glaze Type      
Opacity        Semi Opaque
Texture        Semi-Gloss
Stability        No Movement
Fit        Dense Crazing
Last changed:    28/12/2011
Status        Tested
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Comment:
lovely colour but poor fit on MFW and N21 but no crazing on LF18

Licorice Glaze Hesselberth and Roy

H&R GBG 2 NZ  LICORICE

,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

Cone 6     1201 deg.C. -                          

,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

Ferro 4108                               30.90

Feldspar GL/AP-240                21.00

Clay Ceram                              17.50

Talc Westalc 35                       4.80

Whiting                                     4.80

Silica                                        21.00

Red Iron Oxide                         9.00

Cobalt Carbonate                      2.00

,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

                Seger      

KNO          0.305    

CaO           0.550    

MgO          0.146    

Al2O3        0.386    

B2O3         0.335    

SiO2          4.116    

TiO2          0.008    

K2O           0.100    

Na2O         0.205    

Al:Si           10.65    

Expan.        8.94     

ST           340.81   

,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

Excellent fitting glaze.beautiful on the 3 bodies that I use though less black on LF18

H&R say that leaching is less than 0.02-0.07 and is about as good as it gets,I agree.

UN-Floating Blue my efforts,it snot as easy as you think

I am also keen to develop a floating blue which will work for me..
I did put in a couple of tests..but resulted in snot green and an almost floating blue

FLOTBLUEBRUNNERROY NZ C6 APPROX
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Cone 6 1201 deg.C. -
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Ferro 4108 40.72
Feldspar GL/AP-240 34.32
NZ China Clay 19.18
Magnesium Carb Light 1.82
Silica 3.93
Cobalt Carbonate 2.00
Red Iron Oxide 2.00
Rutile 3.75
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Seger
KNO 0.440
CaO 0.474
MgO 0.087
Al2O3 0.543
B2O3 0.436
SiO2 3.703
TiO2 0.182
K2O 0.161
Na2O 0.279
Al:Si 6.82
Expan. 10.63
ST 335.06
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, Comment:
Rutile-3.75 up to 4. it says do a line blend we use 3.75 works for us!
Cindy Gatto & Mark Petrin
http://www.potters.org/subject90338.htm/

Orange Red Glazes Michael Bailey Cone 6-7

BAILEYS ORANGE RED C6 OX NZ MATE
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

Cone 6 1201 deg.C. -
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

Bone Ash 14.94
Lithium Carbonate 3.98
Feldspar GL/AP-240 51.35
Clay Ceram 3.69
Talc Westalc 35 16.84
Silica 9.18
Red Iron Oxide 11.50
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

Seger
KNO 0.220
CaO 0.341
MgO 0.310
Li2O 0.128
Al2O3 0.246
P2O5 0.111
SiO2 2.218
TiO2 0.001
K2O 0.149
Na2O 0.071
Al:Si 9.04
Expan. 10.10
ST 346.34
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Beautiful glaze,,stunning on MFW slip over N21,,quite different from the matte glaze in his book but really love this one

Tests for Clear White and Semi Matte Cone 6 Glazes Oxidation 23. 12. 11

H & R HCSMATT 2 C6 NZ
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

Cone 6 1201 deg.C. -
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

Ferro 4108 13.22
Gillespe Borate 10.45
Nepheline Syenite 200 3.10
Clay Ceram 41.41
Wollastonite 18.48
Silica 13.30
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

Seger
KNO 0.110
CaO 0.853
MgO 0.037
Al2O3 0.480
B2O3 0.260
SiO2 3.203
TiO2 0.017
K2O 0.005
Na2O 0.105
Al:Si 6.68
Expan. 8.39
ST 367.90

MFW,LF18 and N21,lovely creamy white satin matte glaze no crazing except where thick it might be a bit suspect, unfortunately did not test on an interior surface this time.

H & R HCSMATT 2 C6  NZ

,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

Cone 6     1201 deg.C. - Oxidation                          

,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

Ferro 4108                               13.23

Gillespe Borate                        10.46

Nepheline Syenite 200             3.10

Clay Ceram                              41.42

Wollastonite                             18.48

Silica                                        13.31

,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

                Seger      

KNO          0.110    

CaO           0.853    

MgO          0.037    

Al2O3        0.480    

B2O3         0.260    

SiO2          3.203    

TiO2          0.017    

K2O           0.005    

Na2O         0.105    

Al:Si            6.68     

Expan.        8.39     

ST           371.62   

,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

Clay Body                                MFw LF18,N21

Colour                      White

Glaze Type                              Calcium semi matte

Opacity                    Semi Opaque

Texture                    Satin Matte

Stability                    No Movement

Fit                            No Crazing

Last changed:         27/12/2011

Status                      Tested

,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

Comment:

Excellent glaze on MFW,N21 and LF18,Very smooth texture on MFW

H&R GBG 2 NZ

,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

Cone 6     1201 deg.C. -                          

,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

Ferro 4108                               30.90

Feldspar GL/AP-240                21.00

Clay Ceram                              17.50

Talc Westalc 35                       4.80

Whiting                                     4.80

Silica                                        21.00

,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

                Seger      

KNO          0.305    

CaO           0.550    

MgO          0.146    

Al2O3        0.386    

B2O3         0.335    

SiO2          4.116    

TiO2          0.008    

K2O           0.100    

Na2O         0.205    

Al:Si           10.65    

Expan.        8.94     

ST           340.81   

Secondary crazing on MFW

Fits LF18 and N21 but slightly opaque

Ist firing Cone 7 tipped ,slow cool makes the difference

The tests below are from Mike Baileys book,Janet De Boos and one I made up from scratch

BG1C BG1BAILEYS CLEARC6
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Cone 6 1201 deg.C. -
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Soda Feldspar 200S 45.00
NZ China Clay 6.00
Bentonite 2.00
Whiting 17.00
Zinc Oxide 5.00
Silica 25.00
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Seger
KNO 0.257
CaO 0.543
MgO 0.004
ZnO 0.197
Al2O3 0.341
SiO2 3.188
TiO2 0.000
K2O 0.008
Na2O 0.249
Al:Si 9.34
Expan. 10.21
ST 364.57
On LF!8(white) and N21 (dark tan) bodies it has a thin shiny bright clear glaze which has not crazed.

T8BC T 8 BAILEYS CLEARC6
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Cone 6 1201 deg.C. -
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Soda Feldspar 200S 37.30
Bentonite 2.00
Whiting 11.80
Zinc Oxide 4.10
Silica 34.50
Dolomite 6.60
Lithium Carbonate 3.70
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Seger
KNO 0.188
CaO 0.442
MgO 0.087
ZnO 0.142
Li2O 0.141
Al2O3 0.202
SiO2 2.857
K2O 0.006
Na2O 0.182
Al:Si 14.13
Expan. 9.02
ST 357.71
Comments:lF18 and N21 Semi gloss ,uncrazed slightly opacified pigskin surface.

T5BC T5 BAILEY CLEAR C6
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Cone 6 1201 deg.C. -
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Soda Feldspar 200S 56.00
Dolomite 6.50
Lithium Carbonate 3.70
Whiting 8.20
Zinc Oxide 4.10
Silica 19.50
Bentonite 2.00
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Seger
KNO 0.283
CaO 0.344
MgO 0.087
ZnO 0.144
Li2O 0.143
Al2O3 0.302
SiO2 2.797
K2O 0.008
Na2O 0.275
Al:Si 9.27
Expan. 10.74
ST 360.68
Very shiny bright surface Uncrazed on LF18 but primary crazing on Number 21,badly fitting with secondary crazing on MFW

BCSM BAILEYS CALCIUMSATIN MATT C6 NZ
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Cone 6 1201 deg.C. - ,
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Soda Feldspar 200S 33.13
Clay Ceram 7.12
Whiting 37.90
Zinc Oxide 3.50
Silica 18.35
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Seger
KNO 0.120
CaO 0.790
ZnO 0.090
Al2O3 0.170
SiO2 1.556
TiO2 0.002
K2O 0.001
Na2O 0.119
Al:Si 9.15
Expan. 11.21
ST 383.12
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
LF18,N21 and midfire white badly crazed..secondary crazing semi matt white surface,lovely colour response to copper and cobalt carb

BASM BAILEYS AS MATTE 1 C6
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Cone 6 1201 deg.C. -
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Feldspar GL/AP-240 67.16
Clay Ceram 16.09
Dolomite 5.23
Whiting 4.98
Zinc Oxide 4.79
Silica 1.72
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Seger
KNO 0.400
CaO 0.300
MgO 0.090
ZnO 0.210
Al2O3 0.600
SiO2 3.270
TiO2 0.007
K2O 0.292
Na2O 0.108
Al:Si 5.45
Expan. 11.99
ST 372.19
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
LF18 crazing where very thick,smooth matt surface

DEBOOS75.C6
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Cone 6 1201 deg.C. -
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Nepheline Syenite 200 30.00
Silica 35.00
Whiting 15.00
Dolomite 10.00
Ferro 4108 10.00
Lithium Carbonate 2.00
Ball Clay FX 15.00
Tin Oxide 3.00
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Seger
KNO 0.194
CaO 0.619
MgO 0.117
Li2O 0.069
Al2O3 0.286
B2O3 0.071
SiO2 2.842
TiO2 0.007
K2O 0.037
Na2O 0.157
Al:Si 9.95
Expan. 9.46
ST 360.22
Lovely smooth semi opaque satin matte glaze,more muted colour response with copper,cobalt and hopper black stain

MAGIC4COLOUR ENHANCERC6
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Cone 6 1201 deg.C. - Ox. or Red.
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Cornish Stone 37.00
Ferro 4108 6.00
Dolomite 7.00
Whiting 11.00
Ball Clay FX 16.00
Silica 7.00
Ferro 4124 16.00
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Seger
KNO 0.204
CaO 0.695
MgO 0.101
Al2O3 0.360
B2O3 0.150
SiO2 2.889
TiO2 0.009
K2O 0.051
Na2O 0.153
Al:Si 8.03
Expan. 9.70
ST 363.82
Primary crazing where double dipped,shiny smooth clear glaze,good strong colour with Cobalt Carb and Hopper black stain on MFW body.the Hopper stain is from Robin Hoppers' book Ceramic Spectrum by the way

Firing parameters and clay Cone 6-7 tests Electric kiln

Happy New year all,
Have spent the last couple of months preparing and formulating Cone six glazes using materials available in New Zealand. I am very interested to discover some clear glossy food safe, base glazes to experiment with hopefully they will also give me some base lines to develop my own unique glazes which I will post on here,most of the glazes were from Hesselberth and Roy,Mastering Cone Six Glazes and also from Micheal Bailey’s,Cone Six glazes.One was from Janet De Boos and one I developed from scratch after analyzing the alumina and silica levels.
I was using Lawrence Ewings computer glaze program called Matrix to reformulate and replace materials,which I am comfortable with.I find it an easy program to use.
Clay bodies used:
MFW(midfire white,smooth white firing throwing clay for Domestic ware,200 mesh Fires C 2-6,shrinkage about 15%
LF18.course off white body good for throwing and hand building,,50 mesh, shrinkage about 17% Fires C7-8
N21, iron rich stoneware, 50 mesh, shrinkage 16% Fires C7-8


My Firing schedule to 1201 *C Cone 6,was also slow cooled at a ramp of 80 oC to 800oC..I do believe it is important to slow cool and have seen a huge improvement from doing so.
Bisque was to cone 08 (955),Soak one hour.I may increase the bisque to 1000 to reduce further any problems.
NB. R=Ramp per hour T= Temp in Centigrade, H=Hold in minutes
R1 60
T1 100
R2 100
T2 600
R3 150
T3 1150
R4 80
T41201
H 20 mins
R5 80
T 800
OFF natural cool.
Actual temperature was Cone 7 tipped