Applications
UV spot varnish printing changes the traditional printing process, enhancing the quality and tactile sensation of printed materials. Unlike traditional methods, digital spot varnish printing does not require screens or plates. Instead, it utilizes computer control to apply varnish selectively onto image sheets, creating glossy highlights and embossed 3D effects.
Outstanding Features
- The Spot Varnish Printer 750 utilizes a conveyor belt for automatic loading of paper sheets. Vacuum sections on the platform ensure that the substrates remain firmly in place to prevent warping.
- This printer employs single-pass printing technology, allowing it to apply enhancement varnish onto A3+ size paper at speeds of up to 1500 sheets per hour.
- Equipped with three cameras, the digital UV spot varnish printing machine accurately positions each sheet for precise spot varnish results, with varnish thickness ranging from 40um to 110um.
- Featuring a user-friendly human-machine interface with a touch screen, this UV spot varnish printing machine enables easy operation, machine maintenance, cost calculation, and online file editing, thereby streamlining the process.
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Model |
Spot Varnish Printer750 |
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Printhead |
Drop-on-demand piezo,1024 nozzles |
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Paper Wdith |
Max.710mm |
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Printhead configuration |
10H |
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Print Speed* |
High speed |
1500pcs/h A3 size |
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High precision |
1000pcs/h A3 size |
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Paper Positioning |
3 cameras with position error less than 0.2mm |
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Material type |
Coated corrugated paper, SoftTouch film ect. |
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Paper Weight |
135g-400g/m2 |
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Printer Power |
Single Phase AC220V, 6KW |
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Printer Dimensions |
750x240x188cm(LWH) |
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How does UV Spot Varnish Printing work?
Design & Prepress Preparation
The process begins with the creation of a digital design for your folding carton. You'll work with a graphic designer or a prepress team to finalize your design, specifying the areas where you want the UV spot printing to be applied.
01
Plate Making
If using traditional printing methods, once your design is ready, it's transferred onto printing plates. Digital printing, on the other hand, relies on color transfer through digital images, bypassing the need for plates. These plates are then used to transfer the design onto the folding carton material during the printing process. In the case of UV spot printing, additional plates may be required for the UV coating.
02
Printing Setup
Your folding carton material is then loaded onto a printing press. In the case of UV spot printing, the press is equipped with UV printing capabilities, including UV ink or varnish tanks, UV curing lamps, and special printing units.
03
Ink Mixing & Application
Specially formulated to cure rapidly when exposed to UV light, the inks or varnishes are mixed to the desired consistency and color. The printing press then applies the UV ink or varnish only to specified areas of the folding carton material, based on your design. This is where the "spot" aspect of UV spot printing comes into play. The press precisely deposits the UV ink onto the chosen elements of your design.
04
UV Curing
Immediately after the UV ink or varnish is applied, the packaging substrate passes through UV curing lamps. These emit intense UV light, which triggers a chemical reaction in the UV ink or varnish, causing it to dry and harden almost instantly. This curing process is crucial to achieving the desired glossy or matte finish and enhancing durability.
05
Quality Control
As your folding carton substrate progresses through the press, quality control checks are performed to ensure the UV spot printing is applied accurately, consistently, and in accordance with your design specifications.
06
Finishing & Packaging
After UV spot printing, the packaging materials may undergo additional finishing processes such as cutting, creasing, folding, and gluing to form the final carton shape. The finished cartons are then packaged and prepared for shipment or distribution.
07
Cleanup & Maintenance
The printing press and equipment used in UV spot printing require regular maintenance to ensure optimal performance. Cleaning and maintaining the UV curing lamps, ink delivery systems, and printing units are essential for consistent results.
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What factors should be considered when purchasing a UV Spot Varnish Printing?
Know the print performance of UV printer
UV printers coming from different factories may show different print performance. So it is necessary to know about the print quality and color restoration ability of machine. The best solution is that you can ask for some print samples to see the performance.
Consider the machine stability
The stability of UV printer plays a crucial role in guarantee the production efficiency. If a UV printer is not stable and breaks easily, it will cause you to fail to finish the orders within the agreed time, leaving bad impression on your customers. By choosing a brand with a good reputation for product quality and after-sales service, you can have confidence in your purchase.
Consider the price of UV printer
UV printers of different sizes and equipment have different prices. You need to decide according to your own budget.
Training, technical support and service
At some points, your UV printer will require maintenance and servicing. When you invest in a UV printer, it's crucial to consider the benefits of receiving comprehensive engineering support and a service package. By doing so, you can ensure that your printer remains operational for an extended period, allowing you to stay ahead in the game.
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