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Major technical problems in packaging and printing have long plagued people. The problems are mainly focused on 1 ink migration; 2 ink film yellowing; 3 white spots on printed products; 4 back sticking and adhesion; 5 discoloration and fading; 6 ink film floating white; Pin holes and shrink holes; 8 transfer without ink; 9 bite color (commonly known as cross-color) and fade; 10 gloss difference (white). These printing technology problems have become a commonly agreed production failure.
1. Ink migration. Migration is the process by which the pigments in the ink pass through or through the film to another type of material (sometimes also stuck to the product in the package) causing contamination. The reason is that the packaging printing ink and the substrate (such as a plastic film) contain excessive plasticizers. The excessive amount of additives in the ink system may sometimes cause some of the ink's pigment to dissolve in the solvent of the printing ink, resulting in the substrate (e.g. Moving in the film), there is also a pattern ink film printed by the stored print when it is used in the summer due to a temperature rise, and the migration speed is accelerated.
The countermeasures are: to minimize the use of plasticizers or hydrophilic substrates in substrates, especially packaging printing inks, and to avoid the use of pigment inks that contain dissolved in plasticizers and water. In the formulation of the ink, the best conditions for overprinting, final use and purpose of the second, third, fourth, etc... are considered.
2. Ink film yellowed. Printing ink film In the white ink system, titanium dioxide powder with high coloring power, high hiding power, good whiteness, and high light scattering capability is selected as the ink colorant. I do not know that the material has photochemical activity, that is, there will be problems such as loss of light, discoloration, powdering, and peeling after printing. Yellowing is one of the biggest headaches for people in recent years.
To overcome this defect, only a reasonable amount of X24 can overcome this drawback and make up for its shortcomings. If yellowing is found during printing, operators need to add X24 to the ink bucket. This not only improves the whiteness and hiding power of the original white ink, but also greatly reduces the cost of printing ink materials by as much as 10% to 30%.
In addition, the yellowing of color ink is the same as that of white ink. Adding only X24, 0.5%-2% can also avoid yellowing. In the same way, the pH and environment of the substrate can also lead to yellowing of the graphic and ink film. In practice, the PH value will increase the oil absorption of the pigment filler in the ink system, resulting in the pseudo-thick or dry knot of the ink. In severe cases, the ink will not transfer to the ink or the color concentration after the transfer will become lighter. Yellowing is usually ruled out, and the addition of 1010 antioxidants and anti-ultraviolet absorbers are also temporary treatments.
1. Ink migration. Migration is the process by which the pigments in the ink pass through or through the film to another type of material (sometimes also stuck to the product in the package) causing contamination. The reason is that the packaging printing ink and the substrate (such as a plastic film) contain excessive plasticizers. The excessive amount of additives in the ink system may sometimes cause some of the ink's pigment to dissolve in the solvent of the printing ink, resulting in the substrate (e.g. Moving in the film), there is also a pattern ink film printed by the stored print when it is used in the summer due to a temperature rise, and the migration speed is accelerated.
The countermeasures are: to minimize the use of plasticizers or hydrophilic substrates in substrates, especially packaging printing inks, and to avoid the use of pigment inks that contain dissolved in plasticizers and water. In the formulation of the ink, the best conditions for overprinting, final use and purpose of the second, third, fourth, etc... are considered.
2. Ink film yellowed. Printing ink film In the white ink system, titanium dioxide powder with high coloring power, high hiding power, good whiteness, and high light scattering capability is selected as the ink colorant. I do not know that the material has photochemical activity, that is, there will be problems such as loss of light, discoloration, powdering, and peeling after printing. Yellowing is one of the biggest headaches for people in recent years.
To overcome this defect, only a reasonable amount of X24 can overcome this drawback and make up for its shortcomings. If yellowing is found during printing, operators need to add X24 to the ink bucket. This not only improves the whiteness and hiding power of the original white ink, but also greatly reduces the cost of printing ink materials by as much as 10% to 30%.
In addition, the yellowing of color ink is the same as that of white ink. Adding only X24, 0.5%-2% can also avoid yellowing. In the same way, the pH and environment of the substrate can also lead to yellowing of the graphic and ink film. In practice, the PH value will increase the oil absorption of the pigment filler in the ink system, resulting in the pseudo-thick or dry knot of the ink. In severe cases, the ink will not transfer to the ink or the color concentration after the transfer will become lighter. Yellowing is usually ruled out, and the addition of 1010 antioxidants and anti-ultraviolet absorbers are also temporary treatments.
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