The Pyongyang Dental Hygiene Supplies Factory has newly established a peppermint oil refining process.
“Perfumes account for 50 percent of the ingredients in toothpaste production, and our factory mainly uses peppermint oil among several other perfumes,” said Jon Chol Jin, chief of the factory’s research institute, adding it relied on imported perfumes in the past.
In order to ensure the domestic production of materials, it established the peppermint oil refining process based on vapour distillation last year.
However, it had low productivity yet with high electricity consumption.
“To overcome such shortcomings we replaced it with a similar process based on vacuum distillation,” said technical staffer Pak Hyon Il.
It proved to be superior to the former.
It increased daily output to over three times and reduced power consumption to one fourth, while preserving the clearness, transparency and original scent of peppermint oil.
“Peppermint has been familiar to Koreans from olden times. The establishment of the peppermint oil refining process helps the factory improve the quality of toothpastes such as durability of scent,” said Pak.
The factory turns out dozens of kinds of toothpastes including functional and curative ones.
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