Rondepak-Plus is a solvent-based Screen Ink for container printing, offering adhesion to various plastics, glass and some metals. Rondepak-Plus has excellent resistance to a wide range of solvents and chemicals used in cosmetics, personal care and household cleaning. As a high gloss, fast drying, single pack system, Rondepak-Plus shows good adhesion immediately upon drying, while final properties will be achieved in 5-7 days.
A wide range of standard colours are available. If you have a specific requirement for a special match colour SISS offer a full colour matching service either to internationally recognised standards or customers own patterns.
It is essential that Polyolefin surfaces are treated prior to printing to enable ink adhesion.
For most containers, flame treatment is the preferred method, and should be carried out as short a time as possible before printing ideally in-line. The degree of surface treatment should be assessed, before a print run, using proprietary test methods or by making and checking test prints.
Rondepak-Plus also gives good adhesion to many metal and coated surfaces. However its suitability MUST be checked prior to printing. Rondepak-Plus inks are not suitable for outdoor applications.
Stencils & Meshes
All types of solvent resistant photographic direct stencil materials are suitable – emulsion or capillary film. Although all types of mesh are suitable, monofiliment Polyester, in the range 90 – 140T will give the best results.
Ink Adjustment + Printing
Rondepak-Plus inks are designed to print straight from the can, but if reduction is required, Fast reducer 10-1-0007, Reducer 10-1-0006, Retarder 10-1-0005 or a combination of these can be used to thin the ink to desired printing viscosity.
Plastic substrates must have a minimum surface energy level of 48 dynes/cm for optimum ink flow and adhesion. Maintain ink temperature at 18-32oC for optimum print and cure performance. Lower temperatures increase ink viscosity, impairing flow and increasing film thickness. Higher temperatures lower ink viscosity, reducing print definition and film thickness.
Drying time will depend upon a number of factors, such as the film weight deposited, the type of thinner used and the drying temperature. However, as a guide, prints should air dry to touch in 8-15 minutes. For best results, force dry between 32-83oC with good airflow to facilitate solvent evaporation.
Providing that adequate surface treatment is obtained, Rondepak-Plus inks give excellent resistance to a wide variety of products, including detergents, oils and cosmetics.
Rondepak-Plus inks can be superimposed successfully, providing that there is not excessive drying between colours. Over-stoving or a long period of time between prints could result in poor intercoat adhesion.
Reducer 10-1-0006 or G P Screenwash should be used
IT IS ESSENTIAL THAT SCREENS AND EQUIPMENT ARE CLEANED IMMEDIATELY, AS “DRIED-IN” INK WILL NOT BE SOLUBLE IN CONVENTIONAL SOLVENTS
Safety & Handling
Full handling advice is given on a separate H & S Data sheet.
It is imperative that users fully test their application before commencing a production run. We cannot guarantee the finished results as we have no control over individual operating conditions and production procedures. There is often considerable variance in substrate. While technical information and advice on the use of this product is given in good faith, the user bears sole responsibility for selecting the appropriate product for their end use requirements. Users are also responsible for testing to determine that our product will perform as expected during the printed item’s entire life-cycle from printing, post print processing and shipment to end use. Any liability associated with the use of this product is limited to the value of the product purchased from SISS.