The Hortus pot in glass is manufactured at Reijmyre glassworks in Östergötland, Sweden. Seven craftsmen are involved in the process from start to finish: a glass melter, four glassblowers and two craftsmen who are responsible for the finishing.
The work begins with letting the glass mass melt in the furnace over night. When the glassblowers have finished working for the day, the glass melter begins his shift. He raises the furnace temperature to 140°C and shovels in about 500 kilos of glass, which is then melted under close supervision. Early in the morning, the temperature is lowered so that the glass mass is down to a working temperature of 1,100°C when the glassblowers start their working day at 6.00am.
The manufacturing process now begins in the blowing room. One glassblower catches the glass mass, while another cuts off just the right amount of glass in the iron mould before the glass can be pressed out again.
This phase is the most difficult one in the process and the one requiring the greatest experience and expertise. An exact amount of glass must be caught and cut off without any glass blisters or other defects occurring, something that can only be done by hand and with the right feeling for the craft.
When the glass has cooled to about 650°C, the Hortus pot can be lifted from the mould to a table where two new glassblowers polish it with a gas flame, making it neat and shiny. The pot is then brought to a cooling oven where the temperature is slowly lowered from 500°C to room temperature, which takes about six hours.
When the pot is cold, it’s time for finishing and quality control. The few pots that have glass defects are sorted out and melted down again. The remaining ones are engraved with Svenskt Tenn's logo at the base, then washed and checked once again before being packed and delivered to Svenskt Tenn.