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UV Ink For Offset Printing
UV Refractive (Shining) WJX-701
Formula for Paper with laminated foil (golden or Silver paper) PP or OPP film, flexible, abrasion resistance, high coherence, no bubble and pine hole, easy to print and cure. Technical Specification: 1. Appearance: Clear to translucency2. Gravity: 1. 10 / 25 degree centigrade3. Viscidity: 1100 add or minus 100 cps (30degree centigrade) 4. Content: more than 99% . 5. Application: 140-180T Mesh6. Cure speed: 3 sec. 40m / min (80W / cm2 3pcs UV light) 7. Special stencil making needed-Coral Draw template file to develop the film and normal screen stencil process.
All varnishes listed above are suitable for overprinting offset inks. However, if those inks contain to many wax or other slip additives, adhesion problems may arise. Some offset inks contain pigments that start "bleeding" or change colour when overprinted with UV varnishes. Be sure that the offset work is sufficient dried (24 hours) before overprinting with UV screen varnish. Overprinting on wet offset inks, will result in poor adhesion of the UV varnish. Therefore, it is strong advisable to always carry out a print test prior to the actual print job.
DILUTIONWJX UV varnishes are press-ready but must be stirred homogeneously before printing. If necessary, they can be diluted with 5 - 10 % reducer UV.
DRYINGAll varnishes are dried using 1 medium-pressure mercury discharge lamp of 120 W/cm in a normal atmosphere. The curing depends on the kind of UV curing unit ( reflectors ), number, age and power of the UV lamps, the layerthickness and the belt speed of the UV curing unit.
In certain cases the ink's flow and gloss can be improved by passing the prints under IR lamps prior to UV-curing.
CLEANING THE MESHWith WJX-003.
GENERAL PROPERTIESUvegloss varnishes give rub-resistant films with a good resistance to water, solvents and other chemicals.These products have been developed for indoor use. All varnishes have a shelf life of at least 1 year, if stored in a cool, dark place.The stencil must be prepared with a high-quality solvent-resistant emulsion.
SAFETYUvegloss UV varnishes are N-vinyl-2-Pyrrolidone (NVP) free, but are skin irritants. We therefore recommend that you always wear gloves when using them. If varnish does come into contact with your skin, wash it off with soap and warm water immediately. If any of the product comes into contact with your eyes, bathe them thoroughly in water and consult a doctor.For more information we refer to our MSDS. All UV Gloss varnishes are formulated free from heavy metals and comply with EN 71/3 standard.
STORAGEWhen the UV varnish is stored unopened between 15 and 25 °C in its original can; shelf life will be minimum 12 months from date of manufacture. Ink taken from the press should not be returned to the original container; store separately to avoid contamination of unused ink.
COVERAGEOne kg of UV varnish covers between 70 and 100 square metres, depending on the surface and
mesh used and the image being printed.
UV Ink For Offset Printing Transparent