Alvin Pather's Blog: The difference between UV and UV LED inks for printing

UV and UV LED printing inks may look similar, but there are key differences between them that you should consider when selecting the right ink for your printing project.

UV inks are usually based on petroleum-based solvents or resins, which can emit volatile organic compounds (VOCs) during printing. Although they have good adhesion to rigid media, they tend to be expensive and require additional hardware such as lamps and reflectors for curing.

UV LED inks, on the other hand, are water-based and have fewer VOC emissions than their standard UV counterparts. They provide good adhesion to both flexible and rigid substrates, are more cost-effective than standard UV inks, and do not require additional curing equipment.

In this article we will explore the key differences between UV and UV LED ink technologies so you can make an informed decision when selecting the right ink for your next print job.

What Are UV Inks?

UV inks are a type of printing ink that utilises ultraviolet light to cure the pigment and make it adhere to the print surface. This type of ink is a good choice for temperature- and water-sensitive substrates, as it does not rely on high temperatures or large quantities of liquid for curing. As an added bonus, UV inks are known for their vivid colour clarity, which makes them ideal for use in a wide variety of applications including packaging, signs and labels, and point-of-purchase displays.

In addition to the superior quality that UV inks provide, they also last longer than solvent-based ink solutions because they’re able to withstand high levels of humidity, exposure to sun and other elements, and chemicals such as oils and solvents. This makes them ideal for long term outdoor applications such as billboards and other signage.

What Are UV LED Inks?

UV LED inks are a newer form of ink used in printing that use LED lamps as the source of curing energy instead of ultraviolet lamps. These inks, unlike traditional UV inks, are activated by light and cured when exposed to LED light. This makes for a much faster process with higher resolution and less heat which results in a longer lasting print.

The main benefit of UV LED inks is the ability to produce prints on heat sensitive substrates such as wood, glass, plastic and ceramic surfaces which is not possible with traditional methods. Another advantage is the reduced cost since they require less energy and fewer chemical additives. Lastly, they also have less environmental impact since they produce minimal VOC emissions compared to other printing techniques such as screen printing.

Pros and Cons of UV vs. UV LED Inks

Both UV inks and UV LED inks have their own pros and cons, so it's important to consider both when deciding which is best for your business.

Pros of UV Inks:

UV inks offer a number of advantages over traditional inks, including enhanced adhesion on some substrates, better drying times and faster curing. They also produce sharper images with greater vibrancy.

Cons of UV Inks:

The downside to UV inks is that they can be expensive and require specialised equipment. They also require a controlled dry environment and may produce toxic fumes during the curing process.

Pros of UV LED Inks:

UV LED inks are an excellent choice for those who want to save money on ink costs. These inks can be used on a wide range of materials like paper, plastic, wood, and fabric, and are known for producing high-quality images without the need for specialised equipment or a controlled environment. Furthermore, UV LED Inks don't emit toxic fumes during the printing process which makes them much safer to work with than traditional inks.

Cons of UV LED Inks:

The biggest downside to using this type of ink is that they often have slower drying times than traditional UV inks and may require you to adjust your production processes accordingly. Additionally, they may not adhere as well to some substrates as traditional UV inks do.

The Cost of Switching to a UV LED Printer

You may be wondering if it is worth investing in a UV LED printer for your business. There are a few key factors to consider when making this decision, most notably cost.

The initial cost of a UV LED printer can be higher when compared to a UV printer, and the cost of inks can also be higher. However, over time the savings in utility costs alone can be considerable - it takes less energy to power a UV LED printer than one that uses traditional bulbs. Additionally, the ink will last longer than it would with a standard UV printer as the LED inks are less likely to solidify over time. This means less wasted ink and lower costs overall.

The switch to LED-curable ink may also result in improved print quality since there is less glare generated from LED light sources. This makes for more consistent colour and brighter prints that stand out from the competition. You’ll also save time on drying operations because UV LED printers dry much faster than their UV counterparts; some models offer almost instantaneous curing.

All these factors considered, it might just make sense for your business to invest in a UV LED printer for long-term savings and improved print quality.

How to Choose the Right Inks for Your Printing Needs

When it comes to choosing the right inks for your printing needs, you may be wondering what the difference is between UV (ultraviolet) and UV LED (light-emitting diode) inks. Here are the key differences to help you make an informed decision:

Drying Process

UV ink is cured using a mercury vapour lamp that emits ultraviolet light. By contrast, UV LED ink is cured using fluorescent bulbs that emit visible light, which results in lower power consumption and fewer hazardous materials than curing with ultraviolet light.

Cost

The cost of UV ink is typically higher than UV LED ink. This is because of the initial cost of the curing lamp plus additional operational costs such as electricity use, lamp replacement frequency and maintenance requirements.

Inks Quality

The quality of a printed product is largely determined by the type of ink used. UV inks generally produce a sharper image quality while LED inks produce a softer image quality.

Print Durability

When it comes to print durability, both UV and UV LED inks can offer good performance when properly cured. However, UV LED inks are typically more resistant to fading over time due to their stronger curing process, making them ideal for outdoor applications.

The Future of Printing With UV vs. UV LED Inks

The future of printing is looking brighter with the development of UV LED inks. While traditional UV inks rely on the use of hazardous chemicals and ultraviolet lamps, UV LED inks are powered by low-energy LED bulbs, making them a more eco-friendly alternative.

The LED bulbs used to cure UV LED inks requires less energy than UV curing lamps and can be switched off when not in use, resulting in lower operational costs for businesses. In addition, the bulbs produce minimal heat and last for an extended period of time before needing to be replaced – up to 30,000 hours compared to just 1,500 hours for a traditional UV lamp!

Another advantage of UV LED ink is its greater colour gamut. The intense blue light produced by the LEDs allows for a much wider range of colours than traditional UV curing systems. This makes it ideal for applications that require deep black tones or vibrant colours, such as packaging and promotional materials.

In terms of performance and cost savings, UV LED offers unbeatable benefits when compared to conventional UV printing methods. With its reduced energy consumption, improved colour accuracy and faster drying time, there's no doubt that this technology is set to revolutionise the printing industry and become the go-to choice for businesses in the near future.

Conclusion

In conclusion, UV LED inks and traditional UV inks are both viable options for printing, with each offering their own advantages and disadvantages. While UV LED inks boast higher efficiency, lower temperatures, and less environmental impact, they are more expensive and require specialised equipment to use. Traditional UV inks are cheaper and can be used with any printing setup, but they have lower efficiency, require higher temperatures, and are not as eco-friendly. Ultimately, the decision will depend on your specific needs and budget.