Anforderungen an eine moderne flexodruckfarbe im verpackungsdruck

SERIES 970UV/CD
Technical Data Sheet
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APPLICATION FIELDS:
Euro-Colours / 4-Colour Process Printing Inks:
Special UV screen printing ink in a thixotropic formulation For 4-colour process printing according to DIN 16538, for the printing of Compact Discs with very good adhesion on all current UV CD lacquers and polycarbonate. Lacquers may differ in their chemical structure or method of manufacture. A test for suitability must always be carried CHARACTERISTICS:
This series of high gloss UV ink is very reactive in nature, assuring good curing and adhesion even when printing at The Halftone Black 970 UV 9200 CD can be used with all mentioned 4-Colour Process Printing Inks: Thus, this ink series is excellently suitable for both, inline For additives see "Additional Products" The inks of the 970 UV/CD series are constitutionally free from toxic elements and solvents. The raw materials used meet with the limits stipulated by the EEC regulation EN 71 Bronze Colours:
(Safety of toys), part 3 (Migration of Certain Elements) of see separate "Bronze Colours" leaflet ADDITIONAL PRODUCTS:
RANGE OF COLOURS:
When printing 4-colour process halftones, the transparent The basic ink mixing system consists of 12 basic colours paste (reactive to UV light) can be used to reduce the col- and may be used for the mixing of a wide colour shade our density of the process colours. Raster paste can be range. Field proven mixing formulations exist for Pantone®, added to reduce “Dot Gain” and to achieve sharper dots. Basic Colours:
Transparent Paste (max. addition: 10 %) 970 UV 0124 CD Raster Paste ADDITIVES:
Thinner:
The inks of the 970 UV/CD series are ready to use. If fur- ther viscosity reduction is desired, UV thinner may be add- ed. In order to increase curing, the addition of reactive In general, no solvent-based thinners should be used due Special Products:
Reactive Thinner (max. addition: 2-5 %) 970 UV 0010 CD The above statements are accurate to our best knowledge and belief. However, due to the great number of possible influences during the manufac-ture of the substrate and the variation in the application process we suggest that suitability testing take place under actual conditions before produc-tion. No legal y binding guarantee of certain properties or of the suitability for a definite application purpose can be derived from the above infor-mation. SERIES 970UV/CD
However, it must be noted, that low radiation intensity, Adhesion Modifier:
excessive machine speeds or excessive film thickness can have a negative influence on the curing properties and Whenever high abrasion resistance is required, the addi- adhesion. Un-cured prints are considered a hazardous tion of an adhesion modifier is recommended. However the waste. Therefore, it is recommended to cure misprints addition of adhesion modifier to UV curable ink will lead to under the UV lamp as a matter of principle. After curing, a processing time (potlife) of 4-8 hours at 21°C depending spoilage can be disposed by conventional methods and on the colour shade. Higher processing temperatures will may be incinerated without causing any difficulties. result in a shorter potlife. Overprinting must take place within 12 hours at 21°C in CLEANING:
Screens and squeegees as well as other working materials can be cleaned with the RUCO screen cleaner 32 335. If cleaning is not performed by fully automatic cleaning equipment, protective gloves must be worn. Cleaning liq- Levelling Agent:
uids that are contaminated with UV products should not be used for the washing of working materials that were used The levelling of the ink surface can be optimised by the with conventional screen printing inks. Solvents that con- tain UV residue are not suitable for reclamation and must PROCESSING INSTRUCTIONS:
Stencils / Printing Equipment:
We recommend to stir up all inks before printing. SHELF LIFE:
A shelf life of 12 months is guaranteed when storing the Screen printing meshes between 140-31 (34) threads/cm inks at 21°C and in the original packing container. At high- and 180-27 threads/cm are suitable for printing with UV er storage temperatures the shelf life will be reduced. PRECAUTIONS:
The colour mixing formulations are based on a 150-31 threads/cm mesh. However, test prints and approval of the UV inks may cause irritations and can increase the sensi- colour are generally recommended for the respective print tivity of the skin, possibly leading to hypersensitivity. jobs. The 970 UV/CD series can be used with all screen Therefore, the use of disposable gloves and protective printing machines with screen printing stencils currently goggles is strongly recommended. For further information on the safety, storage and environmental aspects concern- ing these products, please refer to the Material Safety Data Any acrylic acid ester resistant squeegee material may be Additional technical information may be obtained from our Curing Conditions:
staff of the Technical Application Department. The varying UV absorption of the individual colours results in a range of curing properties depending on colour and opacity. All colours of the 970 UV/CD series can be cured by the use of medium pressure mercury vapour lamps (at The optimum energy output is 250 - 300 Millijoule/cm2. UV curing is followed by a 12 hour post-cure phase after which the ink film is fully cured and has its final properties. The above statements are accurate to our best knowledge and belief. However, due to the great number of possible influences during the manufac-ture of the substrate and the variation in the application process we suggest that suitability testing take place under actual conditions before produc-tion. No legal y binding guarantee of certain properties or of the suitability for a definite application purpose can be derived from the above infor-mation.

Source: http://www.ruco.de/fileadmin/documents/ATM_HP/ATM_HP_GB/UV-Siebdruck/TA-970UV-CD-GB.pdf

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