Pyongyang University of Publishing and Printing Industry has recently researched and introduced the satchel-decoration printing process by using an ink jet method based on the CTP technology.
The CTP technology can directly print the image data input in a computer on paper, metal, cloth, leather, glass and wood. It is widely used in the printing industry as this technology does not use film and chemical reagents.
Unlike the currently used screen printing method, the new printing process is simple and can bring printed images into line with original ones. Especially, all materials needed for the printing process are locally available ones.
In order to prevent diffusion in jet printing, one of the knotty problems in establishing the printing process based on an ink jet method, scientists completed a method of transforming the physicochemical property of printing substrate.
In addition, they introduced a rational coating method that meets technical indexes, thus improving brilliance and colour tone and obtaining unfading print images.
They also solved different technical problems including adjusting printing conditions to increase descriptive representation according to manuscript and harmonizing the amount of ink absorption and picture deviation according to the moving speed of printing plate so as to improve representation.
“Thanks to the newly-developed ink jet method for the satchel-decoration printing process, the printing cost has been lowered by one fifth as compared to previously, while further improving the quality of decoration printing,” said scientist Kim Chol Gyu.
Their research finding has been introduced into several bag factories including the Sinuiju Bag Factory.
More From Pyongyang Times
November 29 is World Day of Solidarity with the Palestinian People. The 32nd Session of the UN General Assembly in 1977 decided to
November 29, 2025
November 29 is World Day of Solidarity with the Palestinian People. The 32nd Session of the UN General Assembly in 1977 decided to
A spokesman for the Iranian Foreign Ministry condemned the US’ military threat against Venezuela.The US is widely advertising that
November 29, 2025
A spokesman for the Iranian Foreign Ministry condemned the US’ military threat against Venezuela.The US is widely advertising that
A friendly match between the national women’s football teams of the DPRK and Russia took place at Kim Il Sung Stadium in Pyongyang
November 29, 2025
A friendly match between the national women’s football teams of the DPRK and Russia took place at Kim Il Sung Stadium in Pyongyang
The agricultural workers in Kumbu-ri of Sakju County and Tanghu-ri of Phihyon County in North Phyongan Province have become the
November 29, 2025
The agricultural workers in Kumbu-ri of Sakju County and Tanghu-ri of Phihyon County in North Phyongan Province have become the
Under the wise leadership of the Workers’ Party of Korea, modern tree nurseries rose up in different parts of the DPRK, the
November 29, 2025
Under the wise leadership of the Workers’ Party of Korea, modern tree nurseries rose up in different parts of the DPRK, the
Recently, the UN Office for the Coordination of Humanitarian Affairs published an estimate, which said that more than one million
November 28, 2025
Recently, the UN Office for the Coordination of Humanitarian Affairs published an estimate, which said that more than one million
The World Meteorological Organization recently announced that the concentrations of carbon dioxide, methane and other greenhouse
November 28, 2025
The World Meteorological Organization recently announced that the concentrations of carbon dioxide, methane and other greenhouse
The U-17 men's ice hockey team of Primorsky Krai of Russia on a visit to Pyongyang at the invitation of the Ministry of Physical
November 28, 2025
The U-17 men's ice hockey team of Primorsky Krai of Russia on a visit to Pyongyang at the invitation of the Ministry of Physical
Proud entities of rural rejuvenation have sprung up one after another in North Hamgyong Province under the care of the Workers'
November 28, 2025
Proud entities of rural rejuvenation have sprung up one after another in North Hamgyong Province under the care of the Workers'
Many people come to enjoy themselves at the Chongnyu People’s Open-air Ice Rink on the banks of the Taedong River in Pyongyang.
November 28, 2025
Many people come to enjoy themselves at the Chongnyu People’s Open-air Ice Rink on the banks of the Taedong River in Pyongyang.
By giving priority to scientific research Choe Jin A, lecturer at the Chemistry Faculty of Kim Il Sung University, developed and
November 28, 2025
By giving priority to scientific research Choe Jin A, lecturer at the Chemistry Faculty of Kim Il Sung University, developed and
The construction of rural dwelling houses is progressing apace in different parts of the country amid the dynamic nationwide drive
November 28, 2025
The construction of rural dwelling houses is progressing apace in different parts of the country amid the dynamic nationwide drive
The construction of regional-industry factories planned for this year is progressing at the final stage in 20 cities and counties
November 28, 2025
The construction of regional-industry factories planned for this year is progressing at the final stage in 20 cities and counties
Dmitri Peskov, the Russian president’s press secretary, demanded the Ukrainian authorities come out for peace talks at a press
November 27, 2025
Dmitri Peskov, the Russian president’s press secretary, demanded the Ukrainian authorities come out for peace talks at a press
The Hungarian prime minister said in an interview with a radio broadcasting service on November 21 that he rejected an EU Commissi
November 27, 2025
The Hungarian prime minister said in an interview with a radio broadcasting service on November 21 that he rejected an EU Commissi
The Pukchong County Fruit Processing Factory has undergone renovation. The factory is furnished with hundreds of pieces of
November 27, 2025
The Pukchong County Fruit Processing Factory has undergone renovation. The factory is furnished with hundreds of pieces of
New houses have been built at the Thaeyang Farm in Kyonghung County and at the Hyongje Farm in Puryong County of North Hamgyong
November 27, 2025
New houses have been built at the Thaeyang Farm in Kyonghung County and at the Hyongje Farm in Puryong County of North Hamgyong
Remarkable progress has recently been made in protecting and increasing the forests of the country with the smooth operation of a
November 27, 2025
Remarkable progress has recently been made in protecting and increasing the forests of the country with the smooth operation of a
Kim Jong Un, general secretary of the Workers' Party of Korea and president of the State Affairs of the Democratic People’s
November 27, 2025
Kim Jong Un, general secretary of the Workers' Party of Korea and president of the State Affairs of the Democratic People’s
The Juche-oriented view on the people and people-centred philosophy are the viewpoint and attitude of regarding the masses of the
November 27, 2025
The Juche-oriented view on the people and people-centred philosophy are the viewpoint and attitude of regarding the masses of the
More Articles