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Exploring Common Issues in UV Inkjet Technology (Part 4)

Release time:

2025-07-04 16:58

Exploring Common Issues in UV Inkjet Technology (Part 4)
Exploring Common Issues in UV Inkjet Technology (Part 4)

UV inkjet printing technology, with its high precision, high efficiency, and environmentally friendly characteristics, has found widespread application across numerous industries. However, in practical operation, the issue of blurred print edges frequently arises—particularly for small fonts or intricate details—resulting in indistinct outlines and rough, jagged edges that significantly compromise print quality and visual appeal. This paper conducts an in-depth investigation into the problem of edge blurring in UV inkjet printing, examines its underlying causes, and proposes corresponding solutions.

I. Manifestations of Blurred Pattern Edges

In UV inkjet printing, blurring at the edges of printed patterns is a relatively common issue. Specifically, small fonts or fine details appear indistinct, with ragged, fuzzy edges that lack the expected clarity and sharpness. This phenomenon is especially pronounced when printing high‑resolution images or text, significantly degrading the overall print quality.

II. Cause Analysis

1. DPI setting is too low

DPI is a key metric for assessing print accuracy. When the DPI setting is too low, the print head dispenses fewer ink droplets onto the material, resulting in a loss of fine details and blurred image edges. In general, when DPI falls below 300 dpi, the loss of detail becomes particularly pronounced.

2. Deviation in nozzle verticality

Nozzle perpendicularity refers to the angle between the nozzle and the printing substrate. When nozzle perpendicularity deviates, the ink droplets ejected from the nozzle fail to land precisely at their intended positions on the substrate, resulting in a noticeable offset. This offset is particularly pronounced at the edges, causing the pattern’s borders to appear irregular and producing a blurred effect.

3. The material has poor ink absorption.

The ink-absorption capacity of the printing substrate significantly affects print quality. When the material exhibits poor ink absorption, ink spreads unevenly across the surface—resulting in excessive ink in some areas and insufficient ink in others. This non-uniform ink distribution can cause blurring at the edges of printed patterns and a lack of sharpness.

III. Solution

To address the issue of blurred pattern edges, we can take the following approaches and propose corresponding solutions:

1. Increase the DPI setting

Depending on your printing requirements, increase the DPI setting appropriately to ensure the print head deposits a sufficient number of ink droplets on the material, thereby preserving more fine details. In general, for high‑resolution images or text printing, it is recommended to set the DPI at 300 dpi or higher.

2. Adjust the nozzle’s verticality.

Regularly adjust the nozzle’s vertical alignment to ensure a perpendicular angle between the nozzle and the printing material. During this process, use specialized calibration tools or software to verify and fine-tune the alignment, thereby maintaining precise verticality of the nozzle.

3. Select appropriate printing materials.

Based on the print content and requirements, select printing materials with moderate ink absorption and a smooth surface. For applications demanding high‑precision printing, opt for specialized materials that offer excellent ink absorption and superior surface finish. Additionally, understanding a material’s ink‑absorption characteristics and printability can help you perform necessary pre‑treatments—such as coating—before printing to enhance print quality.

4. Optimize printing parameters

Adjust the printer’s print speed, nozzle temperature, and other parameters according to the characteristics of the printing material and ink. Proper parameter settings help control ink spread and drying rate, thereby reducing edge blurring.

5. Strengthen equipment maintenance and upkeep

Regular maintenance and servicing of UV inkjet printers, including nozzle cleaning and replacement of aged components, help keep the equipment in optimal condition and enhance print quality and stability.

IV. Conclusion

Although edge blurring is a common issue in UV inkjet technology, it can be effectively mitigated by precisely analyzing its root causes—such as DPI settings, printhead alignment, and the substrate’s ink absorption—and implementing targeted solutions. These include increasing the DPI, adjusting printhead perpendicularity, selecting appropriate substrates, optimizing print parameters, and enhancing equipment maintenance. In practical applications, operators should flexibly apply these strategies according to specific use cases, continuously build expertise, and refine printing workflows. By doing so, they can fully leverage the advantages of UV inkjet technology, deliver high‑quality, high‑precision printed products across industries, and drive ongoing innovation and progress.

Disclaimer: The above content has been compiled from publicly available sources and is provided for reference only. If any infringement occurs, please contact us, and we will address it promptly.

Bossin Related Product Recommendations – UV Inkjet
Product Model/English Abbreviation Product Name/Product Type Product Features
B-21 Active amine photosensitizing promoter Low color number, benzene-free, antioxidant and polymerization inhibitor, enhances curing rate.
B-27 Active amine photosensitizing promoter Low color number, benzene-free, low odor, antioxidant and polymerization inhibitor
B-270 Aliphatic polyurethane acrylate Low viscosity, excellent flexibility, good wettability, and excellent leveling.
B-271 Aliphatic polyurethane acrylate Flexibility, low shrinkage, weather resistance, pigment wettability
B-39 Aliphatic polyurethane acrylate Low viscosity, good flexibility, and low volatility.
B-570 Polyester acrylate Low viscosity, benzene-free, low odor, suitable for LED UV.
B-572 Polyester acrylate Low viscosity, low odor, excellent wettability, suitable for LED UV.
B-574 Polyester acrylate Benzene-free, low-odor, and VOC levels meet cigarette-packaging standards.
B-574C Polyester acrylate Low viscosity, low odor, excellent wettability, suitable for LED UV.
B-609 Aliphatic polyurethane acrylate Fast curing, high hardness, scratch resistance, and chemical resistance.
B-619W Aliphatic polyurethane acrylate Fast curing, high hardness, excellent toughness, wear resistance, and chemical resistance.
BM1211 (HPMA) Hydroxypropyl methacrylate HEMA-free, high strength, low irritation, and high adhesion
BM2223 (TPGDA) Di(propylene glycol) diacrylate Good flexibility and low volatility
BM2224 (EO-HDDA) Ethoxylation of 1,6-hexanediol diacrylate It exhibits excellent adhesion to plastics, good dilutability, and low volatility.
BM3231 (TMPTA) Trimethylolpropane triacrylate High crosslink density, high hardness, high gloss, and excellent wear resistance.
BM3380 (3EO-TMPTA) Pentaerythritol triacrylate More flexible and less irritating than TMPTA.
BM3384 (3PO-GPTA) Propylene glycol triacrylate Good flexibility, low irritation, and excellent pigment wetting.

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