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Ta-985-uv-e

Technical Data Sheet
UV screen printing inks
APPLICATION FIELDS:
Special Products:
Universal UV screen printing ink for the printing of blow moulded objects and foils, suitable for substrates made of pre-treated polyolefines, polyethylene (PE), polypropylene (PP), PVC and other plastic types as well as for printing on Substrates may differ in their chemical structure or method of manufacture. A test for suitability must always be carried out before printing. Antistatic, Mould Release Agents and Slip Additives may have negative effects on adhesion, and should be detected and removed prior to printing. CHARACTERISTICS:
This high gloss UV ink series is very reactive in nature, assuring good curing and adhesion even when printing at high machine speeds. Euro-Colours / 4-Colour Process Printing Inks:
The inks of the 985 UV series are constitutionally free from For 4-colour process printing according to DIN 16538, toxic elements and solvents. The raw materials used meet with the limits stipulated by the EEC regulation EN 71 (Safety of toys), part 3 (Migration of Certain Elements) of The inks of this series may also be used for printing on the outside of food packaging and will exhibit good solvent and For additives see "Additional Products" RANGE OF COLOURS:
Bronze Colours:
The basic ink mixing system consists of 12 basic colours see separate "Bronze Colours" leaflet and may be used for the mixing of a wide colour shade range. Field proven mixing formulations exist for Pantone, ADDITIONAL PRODUCTS:
When printing 4-colour process halftones, the transparent paste (reactive to UV light) can be used to reduce the col- Basic Colours:
our density of the process colours. Raster paste can be added to reduce “Dot Gain” and to achieve sharper dots. ADDITIVES:
Thinner:
The inks of the 985 UV series are ready to use. If further viscosity reduction is desired, UV thinner may be added. In order to increase curing, the addition of reactive thinner is The above colours are also available in extremely light-fast In general, no solvent-based thinners should be used due versions having a value of > 7 on the blue wool scale (1-8). to flammable nature of the solvents. UV Thinner 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 legally binding guarantee of certain properties or of the suitability for a definite application purpose can be derived from the above informa-tion. Adhesion Modifier:
have a negative influence on the curing properties and In the case of particularly high resistance requirements, the addition of adhesion modifier is recommended. How- ever the addition of adhesion modifier to UV curable ink Un-cured prints are considered a hazardous waste. There- will lead to a processing time (potlife) of 4-8 hours at 21°C fore, it is recommended to cure misprints under the UV depending on the colour shade. Higher processing tem- lamp as a matter of principle. After curing, spoilage can be peratures will result in a shorter potlife. disposed by conventional methods and may be incinerated Overprinting must take place within 12 hours at 21°C in CLEANING:
Screens and squeegees as well as other working materials Levelling Agent:
can be cleaned with the RUCO screen cleaner 32 335. If cleaning is not performed by fully automatic cleaning The levelling of the ink surface can be optimised by the equipment, protective gloves must be worn. Cleaning liq- uids that are contaminated with UV products should not be used for the washing of working materials that were used with conventional screen printing inks. Solvents that con-tain UV residue are not suitable for reclamation and must PROCESSING INSTRUCTIONS:
Pre-treatment:
Pre-treatment of polyolefines (PE/PP) must be performed by Flame Treatment or CORONA-discharge in order to insure the adhesion of the UV screen printing ink to the SHELF LIFE:
substrate. In case of PE, surface tension needs to be at least 42 mN/m (Dynes/cm), in case of PP at least 52 mN/m A shelf life of 12 months is guaranteed when storing the inks at 21°C and in the original packing container. At higher storage temperatures the shelf life will be reduced. Stencils / Printing Equipment:
PRECAUTIONS:
Screen printing meshes between 140-34 threads/cm and 200-34 threads/cm are suitable for printing with UV inks. UV inks may cause irritations and can increase the sensi- The colour mixing formulations are based on a 165-34 tivity of the skin, possibly leading to hypersensitivity. threads/cm mesh. However, test prints and approval of the Therefore, the use of disposable gloves and protective colour are generally recommended for the respective print jobs. The 985 UV series can be used with all screen- printing machines with screen printing stencils currently For further information on the safety, storage and environ- mental aspects concerning these products, please refer to 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 985 UV 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. However, it must be noted, that low radiation intensity, excessive machine speeds or excessive film thickness can 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 legally binding guarantee of certain properties or of the suitability for a definite application purpose can be derived from the above informa-tion.

Source: http://www.multiplast.co.il/image/users/167541/ftp/my_files/TA-985-UV-E_1_.pdf?id=8400234

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