A fire is lit under the stills. Depending on the desired end product, dried cow manure and wood can be used as fuel. The fire burns all day, while the master distiller constantly checks the temperature. If the boiler gets too hot, it needs to be cooled. Steam generated in the kettle extracts the volatile components from the rose petals and is led through a bamboo pipe to a copper receiving kettle. The latter contains sandalwood oil and is cooled in a water bath. Steam condenses in the receiving kettle, while the volatile, fat-soluble components are being absorbed by the sandalwood oil. After the oil is drained and matured in leather bottles it is sold as attar. The rest of the condensed steam is called hydrosol and it also contains many fragrant ingredients from the rose petals. The hydrosol is the well-known "rose water."