I. Selection Premises: 2 Core Principles
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Process Adaptation: Select lamps based on printing speed and substrate thickness;
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Ink Matching: Confirm compatible wavelength, minimum irradiation intensity and energy demand according to ink supplier's parameter sheet.
II. Process-Specific Selection Schemes
1. Offset Printing (High-Speed & Fine)
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Recommended Type: LED-UV lamp (preferred), high-frequency mercury lamp;
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Core Parameters: Wavelength 365nm/395nm, irradiation intensity ≥800mW/cm² (≥1200mW/cm² for high speed), LED power 300-500W/m;
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Key Requirements: Irradiation uniformity ≥95%, fast start-stop, low heat to avoid substrate deformation.
2. Flexographic Printing (Film/Packaging Adaptation)
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Recommended Type: LED-UV lamp, medium-pressure mercury lamp;
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Core Parameters: Wavelength 365nm/395nm, irradiation intensity ≥600mW/cm² (≥1000mW/cm² for high speed), energy density ≥800mJ/cm²;
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Key Requirements: Customizable length, vibration resistance, no ozone pollution.
3. Screen Printing (Thick Ink Layer/Special Effects)
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Recommended Type: Medium-pressure mercury lamp, high-power LED-UV lamp;
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Core Parameters: Wavelength 365nm (395nm for dark thick ink layers), irradiation intensity ≥500mW/cm² (≥800mW/cm² for thick layers), energy density ≥1500mJ/cm²;
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Key Requirements: Stable energy, adjustable lamp distance, high temperature resistance.
4. Digital Printing (Personalized & Precise)
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Recommended Type: LED-UV lamp (only recommended);
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Core Parameters: Wavelength 395nm, irradiation intensity ≥700mW/cm², stepless energy adjustment 100-2000mJ/cm²;
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Key Requirements: Linked control with printer, uniform lamp bead arrangement, low electromagnetic radiation.
III. Key Selection Principles & Pitfall Avoidance
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Prioritize LED-UV lamps: 50%-70% energy saving, long service life, low heat;
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Verify Qualifications & After-Sales: Require ISO9001, CE/RoHS certification, warranty and emergency maintenance;
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Pitfall Avoidance: Do not blindly select wavelength, do not ignore irradiation intensity, pay attention to substrate heat sensitivity, reject unqualified products.
