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Certyfikat odporności laminatów Prim Jet Color na promieniowanie UV
Light-Fastness Test Results on Prim Jet Color Special Lacquers for Ink Jet Printouts
Introduction
Prim Jet Color prepared a number of over-print lacquer samples, incorporating various levels of NanoZ-40AQ UV absorber as outlined in Table 1. NanoZ-40AQ is a water based dispersion of zinc oxide particles manufactured by Antaria Limited with high transparency, having proven UV absorption characteristics. When used in clear coatings over a UV sensitive substrate, NanoZ-40AQ offers excellent protection against fading. Ink jet printouts prepared using both pigmented inks and dye inks were coated with Prim Jet Color’s protective lacquers; these samples were sent to Antaria for QUV testing (accelerated weathering).
Test Method
Test panels were prepared from samples supplied by Prim Jet Color. These featured pigmented ink and dye ink printouts respectively, coated with lacquers described in Table 1. Pigmented ink samples were exposed to UV radiation for 2000 hours. Dye inks were exposed for 200 hours.
Equipment:
Exposure device model: QUV
Light source model: fluorescent UV lamps, UVA-340
Manufacturer: Q-Panel Lab Products, 800 Canterbury Rd, Cleveland, USA
Colour-meter: Color-guide sphere d/8º spex (6835)
Manufacturer: BYK-Gardner GmbH, Geretsried, Germany.
Camera: Kodak Easy Share C875
Weathering Condition: UV Cycle only, 60ºC
Results
QUV Exposure – Prim Jet Color Pigmented Ink Samples
Fig 1 shows photographs of pigmented ink samples before and after UV exposure. Table 2 shows colour change (ΔE) for uncoated sample and samples coated with improved, extended and ultra extended lacquers.
Figures 2-5 show the changes in colour occurring over the duration of the test associated with blue, red, yellow and black pigments respectively for the unprotected test panel compared with panels treated with improved, extended and ultra-extended lacquers.
QUV Exposure – Prim Jet Color Dye Ink Samples
Fig 6 shows photographs of dye ink samples before and after UV exposure. Table 3 shows colour change (ΔE) for uncoated sample and samples coated with improved,
extended and ultraextended lacquers.
Figures 7-10 show the changes in colour occurring over the duration of the test associated with blue, red, yellow and black dye inks respectively for the unprotected test panel compared with panels treated with improved, extended and ultra-extended lacquers.
Conclusions
The results of these tests show very clearly that upon subsequent exposure to UV radiation, the use of Prim Jet Color’s special lacquers containing NanoZ-40AQ offers excellent resistance to fading when applied to ink jet print outs using either pigmented inks or dye inks.
Disclaimer
The measurements outlined in this report were made by Antaria limited on samples provided by Prim Jet Color. To the best of our knowledge, the results are a true reflection of the resistance to fading offered by the use of 2%, 4% and 6% NanoZ-40AQ in Prim Jet Color’s special lacquers, when applied to ink jet print outs which are subsequently exposed to UV radiation. Antaria Limited does not guarantee in any way the performance of Prim Jet Color special lacquers in the field.
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