1、 Printing process
Choose the appropriate printing method:
Common printing methods for advertising tape include flexographic printing, gravure printing, and screen printing. Flexographic printing is suitable for large-area solid printing and line printing, with bright colors and high printing accuracy; Gravure printing can achieve very fine pattern and text printing, with high color saturation; Screen printing is suitable for special materials such as tape and printing with special effects, such as three-dimensional patterns. Different printing methods have their own advantages and disadvantages, and the appropriate printing method should be selected according to the specific requirements of the advertising tape.
For example, if the advertising pattern is complex and the color requirements are high, gravure printing can be chosen; If it is simple text and logos, flexographic printing may be more suitable.
Control printing parameters:
The parameter settings during the printing process are crucial for printing quality. For example, printing pressure, printing speed, ink viscosity, etc. can all affect the printing effect. Excessive printing pressure may cause deformation of the tape, while insufficient printing pressure may affect the transfer effect of ink; Printing too fast may result in insufficient ink drying, affecting the firmness of colors, while printing too slow may reduce production efficiency.
The viscosity of ink also needs to be adjusted according to the printing method and tape material. Too high viscosity can lead to poor ink flowability and uneven printing, while too low viscosity may cause problems such as ink leakage and blurring.
2、 Ink selection
Choose high-quality ink:
The printing ink of advertising tape should have good adhesion, wear resistance, weather resistance, and color stability. High quality ink can ensure that printed patterns adhere firmly to the surface of the tape, and are not easily peeled off or faded.
For example, some brands of ink use special formulas and techniques that can maintain the brightness and firmness of colors under different environmental conditions.
Consider the environmental friendliness of ink:
With the increasing awareness of environmental protection, more and more companies are paying attention to the environmental friendliness of printing ink. Choosing environmentally friendly ink can reduce pollution to the environment and also meet the needs of consumers. Environmentally friendly inks typically have low VOC (volatile organic compound) content, are non-toxic and odorless.
3、 Tape material
Choose the appropriate tape substrate:
The substrate of advertising tape also has a significant impact on printing quality. Different substrates have different surface characteristics and adsorption properties, which can affect the adhesion effect of ink. Common tape substrates include BOPP (biaxially oriented polypropylene), PVC (polyvinyl chloride), PET (polyethylene terephthalate), etc.
BOPP substrate has the advantages of high transparency, high strength, and low cost, making it suitable for general advertising printing; PVC substrate has good flexibility and strong waterproofing, suitable for advertising and promotion in some special environments; PET substrate has higher strength and temperature resistance, making it suitable for high-end advertising printing.
Ensure that the surface of the tape is flat:
The flatness of the tape surface directly affects the printing effect. If the surface of the tape is uneven, it will cause the printed pattern to be blurry and unclear. During the production process, the production process of the tape should be strictly controlled to ensure that the surface of the tape is smooth and even.
4、 Quality inspection
Establish strict quality inspection standards:
Develop clear quality inspection standards and conduct comprehensive testing of the printing quality of advertising tape. The testing items can include color accuracy, pattern clarity, ink adhesion, wear resistance, weather resistance, etc.
For example, a colorimeter can be used to test the accuracy of colors, a scratch test can be used to test the adhesion of ink, and a friction testing machine can be used to test wear resistance.
Conduct sampling and full inspection:
To ensure the printing quality of advertising tape, sampling and full inspection should be conducted. Sampling inspection can randomly select a certain number of products for testing during the production process to understand the overall quality level of the products; Full inspection refers to testing each roll of advertising tape to ensure that the product meets quality standards.
Regarding the firmness of advertising tape colors, generally speaking, if suitable printing processes, inks, and tape materials are used, and strict quality testing is conducted, the firmness of colors is relatively high and not easily faded. However, in actual use, the firmness of colors can also be affected by the following factors:
Environmental factors:
During the use of advertising tape, if it is exposed to sunlight, rain, high temperature, low temperature and other environments for a long time, the color may gradually fade. Especially in environments with strong ultraviolet radiation, pigments in ink may decompose, resulting in lighter colors.
In order to improve the color fastness of advertising tape in outdoor environments, weather resistant ink and tape materials can be selected, and special surface treatments such as coating with ultraviolet absorbers can be carried out.
Friction and wear:
If advertising tape is frequently subjected to friction and wear, such as during transportation, installation, or long-term use in contact with other objects, the color may gradually peel off.
To reduce the impact of friction and wear on color fastness, a protective film can be applied to the surface of the tape, or wear-resistant ink and tape materials can be selected.
In summary, by selecting appropriate printing processes, inks, and tape materials, and conducting strict quality inspections, the printing quality and color fastness of advertising tape can be guaranteed. In practical use, attention should also be paid to the influence of environmental factors and friction and wear on the firmness of colors, and corresponding protective measures should be taken to extend the service life of advertising tape.