Informational Signs Technical Specifications
Materials and Construction
The choice of material is fundamental to the performance and longevity of informational signs. Common substrates include acrylic, aluminum, PVC, polycarbonate, and various engineered plastics. Acrylic signs offer excellent optical clarity and UV resistance, suitable for high-aesthetic indoor applications or durable outdoor use. Aluminum provides superior strength to weight ratio, corrosion resistance, and is often specified for exterior or industrial environments, available in brushed, anodized, or painted finishes. PVC is a cost-effective option for many indoor and some sheltered outdoor uses, offering good printability. Polycarbonate signs are highly impact-resistant, making them ideal for areas prone to vandalism or extreme conditions. Specialized materials like photoluminescent films are used for emergency exit routes, providing glow-in-the-dark visibility during power outages, while reflective sheeting enhances visibility in low-light conditions when illuminated by external light sources.
Printing and Fabrication Technologies
Modern informational signs utilize advanced printing and fabrication techniques to ensure message clarity and durability. Digital UV flatbed printing allows for high-resolution graphics and text directly onto rigid substrates, offering excellent color fidelity and resistance to fading. Screen printing is often employed for high-volume production, delivering vibrant colors and thick ink layers for enhanced durability, particularly on metal or plastic. Engraving processes, both rotary and laser, create permanent, tactile text and symbols, crucial for ADA compliant signage. Vinyl cutting and application are widely used for crisp text and graphics, especially for custom designs or layered effects on various backings. Subsurface printing, where the graphic is printed on the reverse side of a clear material, protects the image from scratches and environmental wear.
Mounting and Installation
Effective sign placement is dependent on robust and appropriate mounting solutions. Common methods include adhesive backing for smooth indoor surfaces, screw-mounts for secure attachment to walls or posts, and standoff hardware for a more dimensional and aesthetically pleasing presentation. Hanging signs utilize chains or cables, often for overhead wayfinding. Post-mounted signs are typical for outdoor directional information. The selection of mounting hardware must consider the sign's weight, the substrate material, and environmental factors like wind load or public accessibility. Correct installation ensures the sign remains legible and secure throughout its intended lifespan.
Legibility and Compliance Standards
Ensuring legibility is paramount for informational signs. This involves careful consideration of font styles, text size relative to viewing distance, color contrast ratios, and the use of universally recognized symbols. Signs often must comply with specific regulatory standards such as the Americans with Disabilities Act ADA for tactile and Braille requirements, Occupational Safety and Health Administration OSHA for safety and hazard communication, and international standards like ISO 7010 for graphical safety signs. Adherence to these standards is not only a legal requirement but also crucial for effective communication and user safety. Factors like gloss level and anti-glare finishes also contribute to optimal readability under varying lighting conditions.