BD Series Overprintable Hot stamping Foil

Hot stamping foil is a popular method used in various industries to add decorative finishes and metallic effects to a wide range of materials. However, like any other printing or finishing technique, it is not without its challenges. In this article, we will explore some of the common problems encountered when using hot stamping foil and discuss possible solutions to overcome them.

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Main Properties

' Overprintable hot foil, versatile for various graphic substrates, good stampability and adhesion.
' Excellent overprintability with both of conventional and UV inks.
' High metallic gloss.
' Low stamping temperature and good for high-speed stamping.
' Good heat resistance with wide stamping temperature range.
' Good transferring performance, suitable for stamping both medium and broad area.
' Good anti-scratch and rub resistance property.
' ROHS'REACH and VOC approved.

' Overprintable hot foil, versatile for various graphic substrates, good stampability and adhesion.' Excellent overprintability with both of conventional and UV inks.' High metallic gloss.' Low stamping temperature and good for high-speed stamping.' Good heat resistance with wide stamping temperature range.' Good transferring performance, suitable for stamping both medium and broad area.' Good anti-scratch and rub resistance property.' ROHS'REACH and VOC approved.

 

Application

Labels, cigarette packaging, regular packaging like cosmetic cartons, candy packaging, wine boxes,  greeting cards, tubes, advertising material and other graphic materials.

Labels, cigarette packaging, regular packaging like cosmetic cartons, candy packaging, wine boxes, greeting cards, tubes, advertising material and other graphic materials.

 

Printing Machine

Flat-bed and up-and-down press, cylinder, and rotary machines.

Flat-bed and up-and-down press, cylinder, and rotary machines.

 

Substrates

Plain papers, printed papers, coated paper, , plastic labels and OPP laminates'papers with some UV varnishes.

Plain papers, printed papers, coated paper, , plastic labels and OPP laminates'papers with some UV varnishes.

 

Stamping Temperature

' 115-150' on flat-bed and up-and-down machines.
' 135-170' on cylinder machines.
' 170-220' on rotary machines.

 

Common Problems Encountered When Using Hot Stamping Foil

 

Poor Adhesion

One of the most common problems with hot stamping foil is poor adhesion to the substrate. This can result in incomplete or patchy foil transfer, which diminishes the overall quality of the finished product. Poor adhesion can be caused by factors such as improper temperature settings, insufficient pressure, or inadequate surface preparation.

To address this issue, it is crucial to ensure that the substrate surface is clean, dry, and free from any contaminants. Additionally, adjusting the temperature and pressure settings based on the specific requirements of the foil and substrate can greatly improve adhesion.
 

Uneven Transfer

Uneven transfer of the foil can lead to a distorted or inconsistent appearance of the final product. This problem may arise due to variations in the surface texture or porosity of the substrate, improper foil tension, or incorrect machine settings.

To achieve a uniform transfer, it is important to select an appropriate foil type that is compatible with the substrate. Adjusting the foil tension and ensuring even pressure distribution across the stamping area can also help in obtaining consistent results.
 

Foil Wrinkling or Curling

Foil wrinkling or curling can occur during the stamping process, resulting in a compromised finish. This issue can be attributed to factors such as excessive heat, inadequate foil tension, or improper machine setup.

To prevent foil wrinkling, it is important to maintain the correct temperature range and avoid overheating the foil. Proper tension adjustment and careful alignment of the foil with the stamping area are essential to ensure smooth and wrinkle-free transfer.
 

Foil Breakage

Foil breakage can be frustrating as it disrupts the stamping process and leads to the wastage of material. This problem can be caused by various factors such as excessive tension, incorrect machine settings, or poor-quality foils.

It is important to check the tension settings and ensure they are within the recommended range to prevent excessive stress on the foil. Additionally, using high-quality foils from reputable suppliers can help minimize the risk of breakage.
 

Limited Design Detail

Hot stamping foil is known for its ability to create intricate designs and fine details. However, certain design elements may present challenges during the stamping process, resulting in reduced clarity or loss of detail. Factors such as small text or complex designs with fine lines can be more prone to such issues.

To overcome this problem, it is recommended to consult with a hot stamping foil manufacturer or experts who can guide you in selecting the appropriate foil type and provide recommendations for optimizing the design for hot stamping.
 

Conclusion

Hot stamping foil is a versatile and widely used method for adding visual appeal and value to various products. While it offers numerous benefits, it is important to be aware of the common problems that can arise during the hot stamping process.

By understanding these challenges and implementing appropriate solutions, such as ensuring proper surface preparation, adjusting machine settings, and using high-quality foils, one can achieve consistent and high-quality results in hot stamping applications.
 

' 115-150' on flat-bed and up-and-down machines.' 135-170' on cylinder machines.' 170-220' on rotary machines.One of the most common problems with hot stamping foil is poor adhesion to the substrate. This can result in incomplete or patchy foil transfer, which diminishes the overall quality of the finished product. Poor adhesion can be caused by factors such as improper temperature settings, insufficient pressure, or inadequate surface preparation.To address this issue, it is crucial to ensure that the substrate surface is clean, dry, and free from any contaminants. Additionally, adjusting the temperature and pressure settings based on the specific requirements of the foil and substrate can greatly improve adhesion.Uneven transfer of the foil can lead to a distorted or inconsistent appearance of the final product. This problem may arise due to variations in the surface texture or porosity of the substrate, improper foil tension, or incorrect machine settings.To achieve a uniform transfer, it is important to select an appropriate foil type that is compatible with the substrate. Adjusting the foil tension and ensuring even pressure distribution across the stamping area can also help in obtaining consistent results.Foil wrinkling or curling can occur during the stamping process, resulting in a compromised finish. This issue can be attributed to factors such as excessive heat, inadequate foil tension, or improper machine setup.To prevent foil wrinkling, it is important to maintain the correct temperature range and avoid overheating the foil. Proper tension adjustment and careful alignment of the foil with the stamping area are essential to ensure smooth and wrinkle-free transfer.Foil breakage can be frustrating as it disrupts the stamping process and leads to the wastage of material. This problem can be caused by various factors such as excessive tension, incorrect machine settings, or poor-quality foils.It is important to check the tension settings and ensure they are within the recommended range to prevent excessive stress on the foil. Additionally, using high-quality foils from reputable suppliers can help minimize the risk of breakage.Hot stamping foil is known for its ability to create intricate designs and fine details. However, certain design elements may present challenges during the stamping process, resulting in reduced clarity or loss of detail. Factors such as small text or complex designs with fine lines can be more prone to such issues.To overcome this problem, it is recommended to consult with a hot stamping foil manufacturer or experts who can guide you in selecting the appropriate foil type and provide recommendations for optimizing the design for hot stamping.Hot stamping foil is a versatile and widely used method for adding visual appeal and value to various products. While it offers numerous benefits, it is important to be aware of the common problems that can arise during the hot stamping process.By understanding these challenges and implementing appropriate solutions, such as ensuring proper surface preparation, adjusting machine settings, and using high-quality foils, one can achieve consistent and high-quality results in hot stamping applications.

9 problems that are most likely to appear in hot stamping

9 problems that are most likely to appear in hot stamping

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Hot stamping is a key process in post-printing of paper prints, which can greatly increase the added value of printed matter. However, in the actual production process, hot stamping faults are easily caused due to problems such as workshop environment and improper operation. Below, the small craftsman sorted out the nine most prone hot stamping problems for everyone, and gave solutions for your reference.

Hot stamping is not strong

Main reason 1: The hot stamping temperature is low or the pressure is light.

Solution 1: The hot stamping temperature and pressure can be readjusted;

Main reason 2: In the printing process, due to the excessive amount of dry oil added in the ink, the surface of the ink layer is dried too fast to cause crystallization, so that the hot stamping foil is not printed.

Solution 2: First, prevent the occurrence of crystallization when printing; secondly, after the crystallization, the hot stamping foil can be removed, and the printed product is air-pressed under heating, destroying the crystallized layer, and then hot Printed.

Main reason 3: Adding a wax-containing smear agent, a release agent, or a non-drying oily substance to the ink may also cause poor hot stamping.

Solution 3: First, apply a layer of absorbent paper on the printing plate to press the air, and then remove the waxy and non-oily substances on the base ink layer, and then perform the hot stamping operation.

Hot stamped graphics, faint, dizzy

Main reason 1: The hot stamping temperature is too high. If the hot stamping temperature of the printing plate is too high, the hot stamping foil will exceed the limit that can be withstood. At this time, the hot stamping foil will spread to the periphery, causing fainting and fading.

Solution 1: The temperature must be adjusted to the appropriate range according to the characteristics of the hot stamping foil.

Main reason 2: hot stamping foil coking. For the hot stamping foil coking, mainly due to the long-term shutdown during the hot stamping process, a certain part of the hot stamping foil is exposed to the electrothermal high-temperature printing plate for a long time, and the thermal coking phenomenon occurs, and the image will be faint after hot stamping.

Solution 2: If the temperature is reduced during the production process, or the hot stamping foil is removed, a thick paper may be placed in front of the higher temperature printing plate to isolate the hot stamping foil from the printing plate.

Written, paste

Main reasons: hot stamping temperature is too high, hot stamping foil coating is too thick, hot stamping pressure is too large, hot stamping foil installation is slack. The hot stamping temperature is the most important reason. If the temperature of the printing plate is too high during the hot stamping process, the base layer and other film layers will be transferred and viscous, resulting in unclear writing and paste.

Solution: The hot stamping temperature should be adjusted according to the applicable range of the hot stamping foil. In addition, the hot stamping foil with a thin coating should be selected, the appropriate pressure should be adjusted, and the pressure of the pressure roller and the tension of the winding roller should be properly adjusted.

The edges of the image are uneven and unclear

Main performance: When hot stamping, the edge of the graphic has a burr phenomenon, which affects the printing quality.

Main reason 1: The plate pressure is not uniform, mainly because the plate surface is not flat when loading, causing uneven pressure throughout the plate, some pressure is too large, and some are too small, so that the image is unevenly stressed, each Part of the adhesion to the substrate is not the same, resulting in uneven print.

Solution 1: The hot stamping plate must be padded to ensure that the stamping pressure is uniform, so as to ensure the clarity of the graphic.

Main reason 2: If the plate pressure is too high during hot stamping, it can also cause the graphic imprint to be irregular.

Solution 2: Adjust the hot stamping pressure to a suitable level. It is necessary to ensure that the padding of the imprinting machine should be precisely matched according to the area of the pattern, and it is not displaced and moves well. In this way, it can ensure that the graphic and the tiling layer match when the hot stamping is performed, and the hair around the graphic is avoided.

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Main reason 3: The pressure is uneven after the same plate is stamped.

Solution 3: This is because the size of the graphic area is very different. The pressure of the large area graphic should be increased. The pressure of the large and small areas can be corrected and adjusted to make them equal.

The main reason 4: too high temperature during hot stamping will also result in irregular graphic imprints.

Solution 4: According to the characteristics of hot stamping foil, reasonably control the hot stamping temperature of the printing plate to ensure that the image is smooth, flat and not hairy.

Graphic imprinting is incomplete, lacking strokes

Main reason 1: The plate is damaged or deformed, which is one of the important reasons for the incompleteness of the graphic imprint.

Solution 1: If the plate is found to be damaged, the plate should be repaired or replaced immediately. The plate is deformed so that the plate does not withstand the applied stamping pressure. The plate should be replaced and the pressure adjusted.

Main reason 2: If the hot stamping foil is cut and conveyed, the edge of the hot stamping foil is too small when it is cut horizontally or the deviation is caused when the cutting foil is cut and unwound, which will make the hot stamping foil and the printing plate image not match. Part of the picture is exposed and the incompleteness is caused.

Solution 2: In order to prevent such problems, it should be neat and flat when cutting the hot stamping foil, and the margin size should be appropriately increased.

The main reason 3: improper printing speed and tightness of hot stamping foil can also cause such failure. For example, the hot stamping foil feeding device is loosely displaced, or the winding core and the reeling spool are loosened, the unwinding speed is changed, and the degree of tightness of the bronzing paper is changed, so that the position of the image and the paper is deviated, resulting in a defective graphic.

Solution 3: At this time, the winding and unwinding positions should be adjusted. If the hot stamping foil is too tight, the pressure of the winding roller and the pulling force of the winding roller should be properly adjusted to ensure proper speed and tightness.

Main reason 4: The position of the printing plate moves and falls at the position of the bottom plate, and the pad of the imprinting mechanism shifts, so that the normal hot stamping pressure changes, and unevenness will result in incompleteness of the graphic imprint.

Solution 4: During the hot stamping process, the hot stamping quality should be checked frequently, quality problems should be analyzed immediately, and the plates and liners should be inspected. The plate is moved or the pad is displaced, adjusted in time, and the plate and pad are placed back in place.

Hot stamping or graphic hair

Main reason 1: The hot stamping temperature is too low, the hot stamping temperature of the printing plate is too low to reach the minimum temperature required for the electro-aluminized foil to separate from the substrate and transferred to the substrate. When hot stamping, the hot stamping paper is not completely transferred, resulting in Graphic flowers, exposed or hot stamping.

Solution 1: When discovering this quality problem, it is necessary to adjust the temperature of the hot plate appropriately in time until the printed product is printed.

Main reason 2: The hot stamping pressure is small. During the hot stamping process, if the stamping pressure of the printing plate is too small and the pressure applied to the electrochemical aluminum foil is too light, the hot stamping paper cannot be smoothly transferred, so that the hot stamping image is incomplete.

Solution 2: If this situation is found, it should be analyzed first whether the stamping pressure is small, and the external observation embossing marks are light and heavy. If the stamping pressure is small, the stamping pressure should be increased.

Main reason 3: The background color is excessively dried and the surface is crystallized, so that the hot stamping foil is not printed.

Solution 3: When hot stamping, the dryness of the underlying color is printed immediately within the printable range. When printing the background color, the ink layer should not be too thick. When the printing amount is large, it must be printed in batches, and the production cycle should be shortened appropriately. Once the crystallization phenomenon is found, the printing should be stopped immediately, and the printing should be continued after searching and troubleshooting.

Main reason 4: The hot stamping foil model is wrong or the quality is not good.

Solution 4: Replace the hot stamping foil with the right model, good quality and strong adhesion. The substrate with a large hot stamping area can be stamped twice continuously, which can avoid hair coloring, exposed bottom and hot stamping.

Hot stamping

The main reason: the hot stamping temperature is too high or the hot stamping pressure is too high or the hot stamping speed is too slow.

Solution: Moderately reduce the temperature of the hot plate, reduce the pressure, and adjust the hot stamping speed. In addition, it is necessary to minimize the number of empty cars and reduce unnecessary parking, because empty cars and parking will increase the temperature of the hot plates.

Hot stamping quality is unstable

Main performance: the same material is used, but the quality of hot stamping is good or bad.

The main reason is that the material quality is unstable, there is a problem with the temperature control of the hot plate or the pressure regulating nut is loose.

Solution: Replace the material first. If the fault persists, it may be the temperature or pressure problem. The temperature and pressure should be adjusted and controlled.

Bottom after hot stamping

The main reasons: First, the printing material pattern is too deep, at this time should replace the printing material; second, the pressure is too small, the temperature is too low, at this time can increase the pressure and increase the temperature.

All in all, there are many reasons for the hot stamping failure. In addition to the hot stamping temperature, pressure and speed, it is also necessary to pay attention to the printing materials or the replacement of hot stamping paper. Only careful analysis can prescribe the right medicine and better eliminate various kinds. malfunction.

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