TECHNO TIP continued *[f the glaze is not melted quite enough try introducing |-2% of a super active flux. * lf your glaze fires medium or low tem- perature, you need to think about Boron. Tt is a low melting glass and tt is a very compelling oxide. [tis supplied in Gerstley Gorale, Borag and ints. Unfortunately these materials bring along a host of other ox- ides so you need to be able to do ceramic chemistry to figure out how to juggle ma- terials in arecipe so the end product is only achange inthe amount of B203. However there are some boron fits (¢.g. Ferro 3195, S124) that are balanced enough to be a glave in themselves; thus adding or re- moving amounts from your glaze may have litthke impact on fired appearance. One of the beauties of boron is its low thermal expansion; you can add it without causing a glaze to craze (unlike Na2O, K20 for example), The factors that detenmine the lining range of a glaze are obviously more complex than just the amounts, nurnbers and iden- tities of the fluxes. The fluxes also have tots of implications on other fired glaze properties, And there are dozens of Mux sourcing materials that also contain silica and alumina and other fluxes and you need ceramic calculation to deal with these things. However this docs not mean we can't make simple changes to adjust firing Derieperik tere, A note about testing: You will want to fire tesis to compare the results. You might consider using a flow tesier to measure how fluid your glaze is and compare changes. For information visit: http:/f www idigitalfire.com/magicf finingternp btm Tony Hansen The Techno Tip is sponsored by Pisinaman Clave Lid in Medicine Hat, Alberta Denys James ADOBE CLAY WORKSHOP Sun June 24 to Sat June 30 Constrect a wood-fired adobe kiln from locally available clay, sand, straw, and sawdust thal are bleeded to form the basis ofa bottle shaped low-temperature kiln. The instructor demonstrates handbuilding techniques, surface realments, slips, stains, terra sigillata; make clay pieces to be fired in newly constructed kiln, Learn the basic techniques of wood-firing and post-firing Taku reduction. Expersence the entire proc- ess at Kicking Mule Ranch, home of Mary Anne and Bob Sits, im Maxama, WA. Fee: $185 US ($296 CN) includes accom- neelation cabin sharing or camping, meals include breakfast and some other meals, Cooking facilities available. Deposit: $50, Mail deposit or complete fee of $185 US to Denys James, 182 Welbury Drive, Salt Spring Island, BC, CanadaWEK 2L. Info: phone/fax 250.537.4906 or email and visit website: www. denysjames. TRAVEL TURKEY & MEXICO TURKEY Istanbul and Cappadocia Seplember 17-Octaber 4, 2001 Workshop/excursionfistorical and cul- tural tours Istanbul ceramics collections, artist stu- dios, Topkapi palace, Aya Sophia, Blue Mosque, Bosphorous ferry trip. Work with local ceramist Ergodan Gulec in Cappadocia. Explore 13C underground cities, Extend your stay and consider op- tional trips lo Ephesus, Troy, Greek is- lands. Fee $2950-3150 Cdn. Includes airfare from Van: 1 couver, internal airfare, accomme- dation, breakfast, tuition, tours, Iransfers, Deposit $150. June 200 | CLAY WORKSHOPS with DENYS JAMES MEXICO San Miguel de Allende November 29-December 14, 2001 Handbuilding workshoplexcursion/lan- guage/art/tours Denys” workshop focuses on surface (real ment and firing options at low tempera- ture, Also available: silverwork, drawing, painting, Spanish, bronae casting and mone. Fee 1795-19938. Includes airfare from Vancouver, transfers, accommodation, all nteals, tuition. Variable return dutes avail- able, Deposit $100 by August [. Potters Guild of British Columbia Oaxaca January 17-Bebruary 5, 20072 Workshomexcursionlanguage/art Handbuitding, surface development and low lempenvure firing including woodlfired adobe bottle kiln, saggar, pit, Raku. Fee $1925-2125. Includes airfare from Van- couver, transfers, tuition, homestay and breakfast with Mexican family, Spanish instruction, ancient pottery forming and firing day in Zapotec village. visitto Monte Alban. Deposit $100 by August 24). Information or Registration DENYS JAMES [82 Welbury Drive Saltspring Island, BC VSK 2L8 Phonefax 234,35.27,. 4906 e-mail : Website: wwwalenysjames.com