“I formed a close connection with Sonamu (pine tree) brand a few years ago when I was employed in this factory” said Yun Chang Nam (pictured), a worker at the Pyongyang Bag Factory.
At that time the factory used steel plate to make its logo, so it failed to produce the desired effect, he recalled.
An idea began to form in his mind to introduce an embossing printing method, which produces three-dimensional on the printed matter.
He had already worked at a printing factory for years and finished a college course by joining the study-while-you-work system at that time.
“He voluntarily took on the research into embossing printing technology to improve the quality and beauty of the logo. He wanted to make the Sonamu brand really smell the fragrance of pine tree,” said Ju Jin Su, his workshop manager.
Yun Chang Nam decided to use resin as the embossing material, conducting repeated experiments and analysis.
Finally, he succeeded in making the pine tree resin logo.
The new embossing printing technology with resin as the main raw material attracted the attention of experts as soon as it was launched because it ensures relief effect and gloss of the logo at the same time, while consuming little electricity in the printing process.
In succession, he brought out a luminous logo, whose afterglow remains for more than six hours at night after being exposed to sunlight for only five minutes in the daytime.
Last year he developed a localized printing ink.
“The printing ink dries at proper speed compared to the imported one, is highly adhesive to bag cloth, good in softness, colour and gloss for printing delineation and eco-friendly,” said printing workteam leader Kim Kyong Hun.
The introduction of this printing ink helped significantly improve the production efficiency of the factory.
The resin-based embossed logo printing technology and localized printing ink won national patents and were highly appreciated at the 34th National Festival of Science and Technology last year.
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