Perforated window films are among the most versatile materials in wide-format printing. They deliver dynamic, high-visibility graphics on glass while maintaining transparency from the inside out. Whether applied for massive glass building wraps or eye-catching transit vehicles, perforated films transform these surfaces into powerful advertising and branding tools. But not all perforated films are created equal. Behind every successful installation lies a critical technical decision, choosing the right perf ratio. The key lies in understanding the perf ratios and using them strategically so you’re not sacrificing visibility from the inside out. Let’s talk about talk about perf pattern related to performance and purpose as you go to select the ideal film for your next architectural or transportation project.
Understanding Perf Ratios
Perforated window film is a vinyl or PET material with regular patterns of holes, perforation. The perf ratio defines the amount of printable surface versus the through-vision (open) surface. The perforated holes, typically 1.5mm in diameter, allow for a one-way vision effect where graphics are vibrant on the outside and people inside can still see out.
Common ratios include:
- 50/50: 50% holes, 50% print area
- 60/40: 40% holes, 60% print area
- 70/30: 30% holes, 70% print area
- 80/20: 20% holes, 80% print area
The higher the print area percentage, the more area there is for print, resulting in bolder, more vibrant graphics. Even so, this comes at the expense of reduced visibility from the inside. Finding the right balance for your application is key to a successful project.
Perf Films Ratios for Architectural Building Wraps
Wrapping a glass-faced building in a downtown area creates a big impact. Large-scale building wraps demand a careful balance between graphic impact and interior light transmission. These surfaces serve both an aesthetic and functional purpose.
Perforated window films can be used for LEED-conscious projects. When a non-PVC film is used or energy-reducing features are achieved, the film can support sustainability goals while adding vibrant branding and interest.
70/30 or 60/40 Perf Ratio
Multi-story wraps and branding are vivid with 60-70% print area. These commonly used ratios allow for good exterior visibility and large image saturation at a distance while allowing ample daylight to pass through. Allowing ample light to filter through can reduce the need for artificial light inside and maintain view to the outside.
80/20 Perf Ratio
When print quality and definition are critical, 80/20 perf ratio allows intricate artwork or high-resolution photography to shine. It creates a nearly opaque appearance on the outside. From the inside, the perf creates more privacy and sun shading than other ratios. This perf ratio has the highest impact for imagery but the lowest amount of through vision.
50/50 Perf Ratio
Not commonly used for building wraps, 50/50 perf ratio can make outward visibility priority and de-prioritizing graphic vibrancy. Ideal for interior spaces like retail spaces and lobbies, the transparency enhances user experience indoors.
Using Multiple Perf Ratios for Building Wraps
In multi-story building wrap installations, using different perf ratios for different floors can optimize the impact of your graphics. Use higher perf ratios like 70/30 on higher floors where light and privacy are less critical but graphic vibrancy is a priority. With the priority of see-through on lower floors, use lower ratios like 50/50 perf ratio. Tailoring the material to the priorities of each area can make graphics more impactful and meet the goals of interior spaces.
Perf Films Ratios for Transit and Out of Home (OOH) Advertising
Out of home advertising (OOH Advertising) relies heavily on high visual performance, safety compliance, and durability. Perforated films are used to wrap buses, trains, and other mass transit vehicles transforming these vehicles into mobile billboards. When it comes to transit advertising, transit agencies have visibility standards for films used on vehicles. For instance, some agencies restrict the use of films on specific windows like the driver side windows or windshield to avoid visibility impairment. Always consult the transit authority for specific guidelines.
50/50 Perf Ratio
An industry standard, 50/50 perf ratio is used for transit windows. It offers a compromise between graphic visibility outside and passenger experience from the inside. The larger perforations ensure a clear view through the graphics, an important factor for safety and comfort.
60/40 Perf Ratio
For bolder graphics, 60/40 perf ratio can be a match for campaigns that have more detailed imagery or color. The increased print surface can enhance the message without overly compromising visibility.
70/30 & 80/20 Perf Ratios
Rarely used due to safety concerns, 70/30 and 80/20 perf ratios can impair the driver’s view and make passengers feel confined. In some transit vehicles, there are non-passenger areas where these perf ratios may be used. Static train wraps or non-window vehicle surfaces may use these films where visual impact can be prioritized.
Choosing Perforated Film is More Than the Perf Ratio
Choosing the right perf ratio is just one variable to your building wrap or transit project. Adhesive, UV and environmental durability, and laminate compatibility are all part of the application success. Optically clear overlaminates add longer life to the application, in addition to reducing the hazy effect seen in some perforated films. When graphic clarity matters, an optically clear laminate is useful for high end applications. Always consult with your trusted film manufacturer or distributor to work through the requirements of your project.
Perforated window films are a tool to empower designers, advertisers, and architects to tell a story in architectural building wrap and transit applications. Whether branding skyscrapers or wrapping a city bus, choosing the material with perf ratios and other factors that meet the project goals for visual impact, interior experience, and regulations. Understanding these options isn’t just technical, but builds the foundation for a bold, effective experience.
Learn more about the widest perforated window film offering on the market!
Related News
Comparing the Use of One Step and Two Step Floor Graphic Solutions
Continental Grafix Cold Weather Film Buyer’s Guide
Maximizing Impact with Floor Graphics: Tips for Retail and Public Spaces
