Q: Do you have any print profiles or recommended printer settings for Contra Vision® perforated window film?
A: We don’t have bespoke profiles for Contra Vision® perforated window films. We suggest either using the 3M IJ40-10 profile, or another generic profile for gloss, white self-adhesive vinyl. In our experience, many of the profiles for perforated window films unnecessarily use too much ink.

Q: My HP Latex machine cannot detect the edge of the material, how can I resolve this?
A: Due to the nature of our Grayliner technology, the edge detection system may not pick up the edge of the material during the initial loading procedure. This does seem to vary from individual printer to individual printer. There are a couple of solutions:
1. Load the material as a mesh (not in the RIP, loading settings only). 
2. Use an 18 inch or so leader of cheap white vinyl of the same width. 
3. Apply (pale) masking tape along the edges of the first 3 feet of material – the extra length enables you to advance the material after the initial loading and peel the masking tape off.

Q: Does Contra Vision® have a fire rating?
A: Yes unprinted Contra Vision® Performance achieved Class 0 Building Regs. and Class 1 BS476 Pt7.

Q: I have a problem with heat from sunlight coming through my windows. Will Contra Vision® have any effect reducing the heat? If so, are there any statistics available?
A: Contra Vision® perforated window film is available at different levels of transparency, measured by the percentage of the total area that is represented by the perforated holes. As an example, Contra Vision® 30% transparency white on black perforated window film comprises of 30% holes and 70% solid material. Sunlight is blocked by the solid material, so 30% transparency material blocks 70% of solar radiation so giving a 70% reduction in UV light and glare. The level of the solar heat gain reduction will be about 10% less, depending on the building construction.

Q: Can Contra Vision® be applied to the inside of a window?
A: Yes. we have perforated and non-perforated products for internal application.

Q: What is the durability of Contra Vision®?
A: Durability stated in our technical data sheets is for unprinted and untreated material correctly applied to an inert, vertical substrate subject to Mid-European weathering conditions. Some printing inks and drying or curing regimes may reduce the expected lifetime of the printed graphic. Please consult your ink manufacturer for guidance. Incorrect application methods, inadequate window cleaning and preparation and incompatible window treatments may reduce the expected lifetime of the applied material whether printed or unprinted, overlaminated or unlaminated. Mechanically sustained damage, chemical damage and UV-degradation to printed, unprinted, laminated or unlaminated material may also reduce expected durability. All perforated window films are especially vulnerable to damage along the edges and corners, which may lead to premature failure. Typical application life is up to eighteen months.

Q: What is the risk that Contra Vision® Window Films will cause glass to break?
A: There is an extremely low probability that Contra Vision® Window Films will exacerbate existing imperfections in glass and cause it to break. We receive 1 reported case for every 250,000 square metres (2,500,000 square feet) of perforated window film we sell.

The main risk is thermal stress caused by differential expansion between adjacent areas of the glass. This normally occurs because sunlight heats the central area of windows but the edges are shaded. The most important factor is the type and quality of the glass. Tempered/toughened glass is unlikely to give any problems because it has very high edge strength and thicker glass is also better. The edge strength of glass can be compromised by small imperfections such as “inclusions” (foreign matter) and how it was cut and treated by the glazier. Other contributory factors include the level of external and internal shading.

Normal window films (non-perforated) are known to increase the risk of thermal stress because they absorb a higher level of solar energy than the glass on its own. The risk is likely to be reduced if a perforated window film is used. This is because the holes help to reduce the relative temperature change and consequent thermal expansion that would take place with the same graphic on a solid substrate. Avoiding dark colours (which absorb more heat) will also reduce the risk.

A thermal stress fracture is easy to spot. One end of the fracture will be in contact with the edge of the window, in a line of about 2-3cm (1 inch), which is a right angle to the edge of the glass. The crack can then deviate in any direction from there.

Q. Can I print Contra Vision® materials with my printer?
A. Contra Vision® perforated window films are typically produced using REACH compliant uncoated pvc. They can be printed with any printer designed to print uncoated plastic materials, using solvent, mid solvent, latex and UV-cured inks. They cannot be printed with domestic or office printers designed to print on paper or plastic coated with an ink-receptive layer.

Q. Where can I buy your material?
A. Printers requiring unprinted Contra Vision® material can buy from our network of distributors. If you require printed Contra Vision® material, we suggest you buy direct from a printer, or tell your regular supplier of printed material that you require Contra Vision® material.

Q. Can I recycle Contra Vision®?

A. Contra Vision® Performance and Contra Vision® Campaign perforated window films are adhesive-coated white on black calendered pvc, presented on a paper-based, silicon coated liner. The pvc complies with European REACH standards, so does not contain the undesirable substances often found in other pvc products.

Our understanding is that the silicone-coated paper and pvc elements of Contra Vision® Performance and Contra Vision® Campaign products cannot practically be recycled. However energy used in the manufacturing of the products can be recovered through appropriate incineration (WtE).