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John Jelfs was born in Exeter, Devon in 1946 and studied ceramics at the Cheltenham College of Art. In 1973, alongside his wife Jude, also a skilled potter in her own right, he set up his own studio, The Cotswold Pottery Company, in the Cotswolds at Bourton on the Water, from where he has been producing ceramics in a wide variety of forms for over fifty years and still continues to work today. Every piece of his pottery is unique, being made entirely by hand and with the decoration kept to a minimum. Wherever possible locally sourced ingredients of clays, limestone and woodash are used for his glazes of celadon, ochre and shino (a white colour glaze developed in Japan sometimes with red,orange or black spotting).

Jelfs writes himself “From my first exposure to studio pottery I was immediately excited by the work of the late Bernard Leach and his lifelong friend the Japanese potter Shoji Hamada. It was the strength and quietness of their pots which most excited me about their work. For the past few years, I have been concentrating on a range of forms, to which I have applied olive/celadon, ochre and shino glazes made up from wood ash and clay, ingredients both local to my studio. The pots are all hand-thrown from a blend of West-country clays, and are often altered while still soft on the wheel. They are fired twice, the first to biscuit (1000 degrees centigrade) and the second firing to stoneware (1300 degrees Centigrade) in a gas kiln. I use a long firing cycle as this brings out the subtlety and depth in my glazes.”

In more recent years, the construction of a new kiln allowed Jelfs to develop the use of ‘soda glazes’, a complex firing process in which a vapour glaze made of sodium oxide (soda) glazes the clay body of the pottery during the firing process. Sodium materials are introduced into the kiln, usually with a nozzle, at a high temperature of over approximately 1280°C (2350°F). The soda then evaporates and the flame carries the vapour within the kiln, landing on the hot pottery pieces where it fuses with the materials in the clay and any slip decoration applied to it. The soda vapours are colourless and it is the reaction on contact that produces a wide range of colours and textures.

“Since the soda fuses to the surfaces of the work in this way, it blurs the line between pot and glaze/surface; they become one.” — Harrison Levenstein

This elegantly potted vase is a prime example of the technique and the wide variety of glaze effects and textures can be seen and admired. As often, the base is unglazed and in this case marked with the artist's stamp ‘JJ’. The earliest pieces were given an impressed ‘swan’ mark soon to be followed with the wording ‘Bourton on the Water’ in addition. The simple mark of the artist’s initials seems to be later which fits with the use of the ‘soda glaze’ technique developed some years after the pottery studio was set up. Jelfs' work has been widely exhibited in leading galleries including Galerie Besson and the Victoria & Albert Museum in London, Alpha House in Sherborne, Beaux Arts, Bath, and the Rufford Ceramics Centre in Nottingham. It is also included in many collections around the world and our vase would make a fine addition to any of them.