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Weather Resistant
Weather Resistant
Solvent-Based Weather Resistant and Heat Resistant Ink Data Sheet
This ink system is used for printing Polyethylene packages that are intended
to be stored outside for periods of time. The pigments used in this system have resistance to both fading and weathering. There are three basic
methods used by CAI for testing of weathering: QUV- cycle 8 hours UV, 4 hours condensation, roof racking outside our plant, and Xenon Arc
weatherometer. The QUV will accelerate results and clycles are typically for 650 hours. Printed material is generally run from one to three cycles
depending on the requirments. The roof racking is slower to get results, but is actual and accurate. The Xenon Arc Weatherometer is run for 250
hour increments up to 1000 hours. We periodically have material tested at DSET in Arizona using their Emmaqua testing equipment, which is believed to be
the closest accelerated testing to actual weathering. There are some differences between colors for overall weathering. For example, Cyan Green
will have better weathering results than any Yellow we make; however, this is to be expected. This ink system is also tested for wet and dry
blocking as well as resistance to contact with wet and dry salt, wet and dry Pine Bark, wet and dry Cedar Mulch (Bark), and a 24-hour water soak.
Each test is performed for 24 hours in a 8oz. glass jar, then the prints are rubbed with tissue and examined to see that the ink does not easily
wipe off. This system is made as a low slip ink system, and as a result will have very little ship ink to ink, or ink to Polyethylene. Generally a
minimum of 24 degree slide angle is obtained when tested ink to ink using a TMI coefficient of friction tester with sliding weight.
Recommended thinners for thinning these inks are Alcohol and Aliphatic Hydrocarbons. Blends can be from 90/10 to 70/30 (Alcohol/Aliphatic
Hydrocarbon). Types of Alcohol that can be used are ISO Alcohol (Fast) and VM&P Naptha (Slow). This ink can further slowed down with the addition
of small amounts of Ektasolve EP; however, care must be taken when using this slow solvent. If too much is used, blocking, ghosting or offsetting
could occur. This ink is also being run successfully with 90/10 Npropanol/ NpropylAcetate.
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