Floating Blue

Floating Blue with GB
Amount %
Nepheline Syenite 47.90 44.5

Gerstley Borate 27.00 25.4
Silica 20.30 18.8
EPK 5.50 5.1
Iron Oxide Red 2.00 1.9
Cobalt Oxide 1.00 0.9
Rutile 4,00 3.7
107.70
James Chappell's book
availabbe ot wwe aiinercoon
2826R
Floating Blue with GB
Unity
Formula Analysis Mole%
CaO 0.42 5.7 7.4
Mg 0.09 09 1.6
K20 0.10 22 17
Na2O 0.39 59 6.9
TiO2 0.19 af 64
AOD 0.51 12.8 9.1
B203 0.43 1.3 6 (7.8
S102 3.48 51.1 671.4
Fe203 0.05 #0 O39
LOl 8.2

CANADIAN CLAY SYMPOSIUM
Submit ideas by May 15 and wint

Saturday, March 23 2002, is the next day for the second
Canadian Clay Symposiom at the Shadbolt Centre, The
theme is Diversity in Clay and covers many aspects with
a wide mange of presenters and events.

We are asking people to submit ideas t present at the
conference. This is your opportunity to put forward an
idea that really interests you. We are looking for a panel,
presentation and slide lecture suggestions, oratitally new
format that you would like to organize, We would love to
bear about i. We are walling to consider anything. We ask

James Chappell, in his book The Potter's Complete Book of
Clay ad Glazes, makes a number of recommendations on using
this recipe: Use distilled! or low mineral water, force all muterial
through an 80 mesh screen, stir thoroughly before and during use
to prevent settling out of the iron content, apply the tuckness of
adime, fire to cone 6 oxidation exactly, and cool normally, One
Interesting comment he makes is: “Don't substitule any other
chemicals for those given,” Since that is exactly what we plan to
do [ might also comment that we have had swecess at lower
temperatures and slower cooling should enhance the effect.

People who use this glaze employ a variety of methods to increase
the variation of surface color (ic. stippling a second layer,
brushing a wash of another coloring oxide, double dipping,
applying a wash of nutile, etc).

2826R1

Floating Blue with Borag 2
Unity
Farmula Analysis Mole%

CaO siO4B BOTA
MgQ O69 O09 16
K20 102s
Na2O0 0.37 56 64
Tio2 019 «37 «33
A203 064 134 92
B203 O47 78 8.0
Si02 3.56 514 613
Fe203 0.05 20 09
Lol = 7.3

Borag 2 produces a visual effect thatis very close to what GB does
in this recipe. The runoff pool flow test shows that the Boray
version has slightly less boron-blue clouding (slower cooling
Should help if this proves to be a problem).

We have had good results using the Borag 2 version of the glaze
on pottery; the visual effect is very similar. It takes a little practice
to learn how to apply the glaze to get the right thickness, Like the
GB version of the glaze, it does tend to form dimples in the surface
if the ware is cooled tow quickly (due to the 20%+ gases of
decomposition that come off during firing).

Remember also that you can deal with slight color variations by
adjusting the amount of iron and cobalt.

for your idea to be 60 or B®) minutes in Jength. If your | Tony Hansen

proposal is accepted your admission to the symposium is .

free, Please send your submissions to Sharon Reay,

Shadbolt Centre for the Ars, 6450 Deer Lake Avenue, The information on this page is from the website

Burnaby, BC, V6H 3R7 by May 15. So go for it. This is hitp:digitalfire.com/perstlevborate/recipest

going to be so good! floatinghlueaherl

Cathi Jefferson 604.929 9775

8 Potters Guild of British Columbia April 200