A critical segment of the acclaimed L1-500 Series, encompassing products L1-505 through L1-509, represents a focused exploration of tonal depth and solid color performance within the 5% openness category. This article provides a detailed, comparative technical breakdown of these five specific Sunscreen fabrics, designed for specifiers who value a cohesive performance profile with nuanced aesthetic choices ranging from light grey to pure black.

Product Definition & Visual Spectrum

This curated group transitions from a soft neutral to deep, dramatic hues, unified by an identical 5% openness factor engineered for optimal light diffusion.

L1-505 (Light Grey): A versatile, medium-light grey. It offers a contemporary alternative to pure white, reducing visual glare and brightness contrast against window frames while maintaining a clean, modern aesthetic.

L1-506 (Dark Grey): A solid, deep grey. Provides a stronger architectural statement and increased light absorption compared to lighter variants, contributing to a more pronounced sense of intimacy and focus.

L1-507 (Black/Brown): A rich, complex dark shade with brown undertones. Introduces warmth into a dark palette, suitable for creating sophisticated, organic, or rustic-modern interiors.

L1-508 (Black/Grey): A two-tone fabric blending black and grey yarns. Creates a subtle, textured appearance that adds visual interest and helps conceal minor imperfections or dust more effectively than solid colors.

L1-509 (Black): A pure, saturated black. Delivers maximum contrast and the highest degree of light absorption within the 5% openness framework, ideal for spaces requiring dramatic effect or enhanced glare reduction on projection surfaces.

Unified Technical Architecture

All five fabrics are constructed to the same rigorous manufacturing standards, ensuring predictable and consistent solar, thermal, and physical performance.

Core Parameter Specification (Common to L1-505, L1-506, L1-507, L1-508, L1-509) Performance Implication

Material Composition 30% High-Tenacity Polyester / 70% PVC Coating This 30% polyester 70% PVC window fabric formulation guarantees durability, dimensional stability, UV resistance, and easy maintenance. The polyester provides strength; the PVC ensures longevity and colorfastness.

Weight (Grammage) 420 g/m² (±5%) Optimized for reliable operation in roller systems, providing enough body for stability and wind resistance without excessive weight that could strain mechanisms.

Thickness 0.60 mm (±5%) Ensures a consistent, neat roll in cassette housings and uniform handling during the cutting and sewing processes.

Openness Factor 5% (±0.5%) The defining performance constant. Engineered to diffuse harsh direct sunlight, eliminating screen glare while preserving clear outward views and allowing soft natural light to permeate the interior.

Weave Structure Thin Plain Weave, 46 x 44 thread count, 0.32mm yarn diameter Creates a fine, uniform surface that is responsible for the consistent optical performance and premium hand-feel of these Roller blinds Fabrics.

Standard Formats Widths: 200cm, 250cm, 300cm. Roll Length: 35 meters. Offers flexibility for covering a vast array of window and glazing system sizes in both residential and commercial projects.

Selection Guidance Based on Functional Aesthetics

The choice among these five is primarily driven by design intent and desired psychological impact:

For a Neutral, Receding Backdrop: L1-505 Light Grey.

For Architectural Boldness & Enhanced Light Absorption: L1-506 Dark Grey.

For Warmth and Depth in Dark Tones: L1-507 Black/Brown.

For Textured Interest and Practicality: L1-508 Black/Grey.

For Maximum Contrast & Dramatic Focus: L1-509 Black.

This central quintet of the L1-500 series exemplifies how a steadfast commitment to a high-performance specification—5% openness in a durable 30% polyester 70% PVC window fabric—can be successfully paired with a thoughtful range of colors to meet precise functional and aesthetic demands in modern architecture.