ozone free uv lamp

Ozone free UV lamp for coating equipment

What is ozone free  UV lamp?

Many finishers today are considering adding UV coating equipment to create a more attractive surface on their printing products to catch their client’s eyes. The big change challenge for them is the safety and handling issues that go along with the process after they start to use “anti-UV” cream on their face and body when they lay on the beach. So how dangerous when you use UV equipment?

Most UV/EB curing materials generally are not “hazardous waste” (toxic, corrosive, flammable, or reactive) as defined under RCRA regulations. However, as with all chemicals, contaminated materials and wastes should be disposed of in accordance with federal and local requirements. In addition, UV/EB curing materials contain little to no VOC’s and typically contain no hazardous air pollutants (HAPS) as specified by the EPA. They are not typically specified in any federal or state Community Right-to-Know list as well.

The only sideproduct of the UV lamp is Ozone Gas. It has a pungent sweet odour and is distinctive enough that concentrations well below the threshold limit value (TLV) of 0.1 ppm are still noticeable. At high enough concentrations, ozone gas and odours can cause headaches and fatigue. After repeated exposure at high concentrations, ozone can cause dryness of the upper respiratory tract, pulmonary irritation and possibly respiratory infections.

Many experts tell you that this is very simple, you only need to increase ventilation. but it is not the truth.

When the device is using a high-power suction and exhaust device, it may cause the UV lamp to open abnormally due to the low temperature.

To solve this problem, the first thing we need to understand is why the UV lamp produces ozone.

The UV curing device produces ultraviolet light having a wavelength in the range of 200 to 425 nm. Among them, when short-wave ultraviolet light below 275 nm is in contact with oxygen in the air, ozone is easily generated, which is a great source of the irritating odour. From the reaction mechanism point of view, the short-wave ultraviolet light will decompose the oxygen molecules in the air, thereby generating free oxygen. Because the positive and negative electrons carried by the free oxygen are unbalanced, it will combine with the oxygen molecules to generate ozone. These ozone often cannot be decomposed by themselves, not only floating in the air but also remaining on the surface of the printed product (the printed product is adsorptive and will retain some of the odours)

How to make an ozone free UV lamp?

On the one hand, the DPL ozone free UV lamp adopts a fully enclosed design. Even when the shutter is opened, the air cannot enter the lampshade and combine with the low-band UV light to generate ozone. On the other hand, when the UV light passes through the special filter function glass window in the lampshade, only the long wavelength UV light can be directed to the printing material, thereby preventing the short wavelength UV light from coming into contact with the air to generate ozone.

DPL ozone free UV lamp is a patented product of our company and has been certified by CE and ul to meet the safety standards of the European Union and the United States.


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