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Hazards of UV Curable Ink

Many types of printing processes are available in the marketplace, from inkjet to laser jet ink types; however, ink manufacturers constantly try to improve upon the ink technology. They strive to create faster drying inks for instant use of the printed product, such as a poster. UV curable ink is a unique ink technology that offers many benefits, but poses numerous hazards as well.

  1. UV Curable Ink Features

    • UV (ultraviolet) curable ink is a solvent-free ink type that hardens instantly into a solid plastic once exposed to ultraviolet light. The ink does not require drying time after printing. The fast drying feature generates a distinct advantage compared to older print technologies, like inkjet, which requires dry time after the ink is applied to the item. Additionally, the UV curable ink does not absorb into the print substrate since it does not contain solvents. The lack of solvents protects the structural integrity of the substrate, creating a consistent print image across any substrate surface.

    Skin Exposure to Ink

    • UV curable ink can cause irritation, or a possible minor allergic reaction, when touching skin. The skin becomes sensitized to the ink composition after exposure. Subsequent ink exposure may result in a severe allergic reaction, depending on the individual's health background.

    UV Light Exposure

    • The UV light used for curing the ink onto the substrate is a high-intensity illumination. Users exposed to the UV light can have burned skin and irritated eyes. However, these symptoms may not occur after immediate exposure; they may develop in a delayed response several hours later. Severe exposure may lead to conjunctivitis, or eyelid mucous membrane inflammation, retinal damage and even sunburn damage.

    Ink Inhalation

    • Small ink droplets accidentally propelled through the air can easily become inhaled. The ink may cause irritation of the respiratory tract and exposed skin. Sensitization of the respiratory tract can lead to allergic reactions if further ink exposure occurs.

    Controlling Ink Exposure

    • UV curable ink should have a temperature control associated with its use among the printing machines. Water or air-cooling ensures that the ink remains at a constant viscosity, preventing accidental ink misting. Employees need to have adequate training before operating the printing machine. Employers should supply specific uniform clothing that covers exposed limbs for obstructing any ink exposure to the skin.

    Ventilation

    • The UV bulb generates ozone as a byproduct during use. The printing machine must remain in an area that is well ventilated. Inhaling ozone without proper ventilation leads to headaches and nausea. Ozone exposure also irritates the eyes, throat and nose.

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