The Plastic 8.27x11.69mm Transparent Black Acrylic 2mm (A4 Size) is a premium optical-grade polymethyl methacrylate (PMMA / Plexiglass) sheet designed for laser cutting, CNC milling, electronic display windows, infrared (IR) sensor filters, and modern equipment enclosures. Sized to standard international A4 dimensions (210 mm × 297 mm / approx. 8.27 × 11.69 inches) with a slim 2.0 mm profile, it features a sleek, tinted smoke-black (translucent gray/black) finish. In normal ambient room lighting, the panel presents a deep, high-gloss semi-opaque black appearance that discreetly conceals internal circuit boards, wiring, and unlit indicators, yet permits bright OLED, LCD, VFD, and seven-segment LED readouts—as well as optical infrared signals—to shine through with high clarity and contrast when illuminated.

Specifications

• Material Type: Cast / Extruded Polymethyl Methacrylate (PMMA / Acrylic / Plexiglass)
• Sheet Size / Standard Footprint: Standard A4 Size (210 mm × 297 mm / approx. 8.27 × 11.69 Inches)
• Nominal Thickness: 2.0 mm (±0.2 mm manufacturing gauge tolerance)
• Color / Optical Tint: Transparent Black / Smoked Gray (Translucent tinted acrylic)
• Surface Texture: Dual-Sided High-Gloss Mirror-Smooth Finish
• Visible Light Transmittance (VLT): Approx. 20% to 30% (Provides high ambient contrast for internal illuminated displays)
• Infrared (IR) Transmittance: High permeability across standard 850 nm to 940 nm optical infrared spectrum bands
• Tensile Strength: ≥ 68 MPa to 75 MPa
• Flexural Modulus: Approx. 3000 MPa to 3300 MPa
• Density: Approx. 1.18 g/cm³ to 1.19 g/cm³
• Heat Deflection Temperature (HDT): Approx. 85°C to 100°C (Softening point ~105°C)
• Continuous Working Service Temperature: -40°C to +80°C
• Surface Masking: Dual-sided protective peel-off kraft paper or clear polyethylene (PE) film
• Machining Compatibility: CO2 laser cutters/engravers, CNC routers, table saws, scroll saws, scoring blades, and localized thermal line benders
• Net Weight: Approx. 145 g to 155 g per sheet

Features

• Contrast-Enhancing Display Window: Deep smoke tint masks internal mounting standoffs, bare PCBs, and unlit display bezels while allowing bright alphanumeric digits, OLED graphics, and status LEDs to pass through crisply.
• Infrared (IR) Transparency: Readily transmits near-infrared wavelengths (850nm–940nm), making it suitable for discreet IR receiver bezels, remote control panels, optical tachometers, and time-of-flight (ToF) rangefinder windows.
• Flame-Polished Laser Edges: Melts cleanly under focused CO2 laser beams with no soot accumulation or burring, producing glass-smooth, flame-polished edge borders straight out of the cutting bed.
• Lightweight & Shatter-Resistant: Up to 10 times more impact-resistant than ordinary float glass while weighing less than half, offering robust physical defense for delicate internal displays.
• Thermoforming Pliability: Can be heated locally between 140°C and 160°C using a strip heater or heat gun to execute clean, permanent 90° bends for custom desktop bezels, angled meter housings, and display stands.

Common Applications

• Electronic Instrument Displays: Front-panel viewing bezels for OLED/LCD screens, vacuum fluorescent displays (VFD), and seven-segment LED counters on custom test bench gear and audio gear.
• Infrared (IR) Sensor Windows: Protective external covers for handheld IR remotes, infrared security cameras, proximity switches, and robotic obstacle avoidance sensors.
• Custom Electronics Enclosures: Fabricating sleek, semi-transparent top covers and side walls for Arduino, Raspberry Pi, amplifier, and DAC enclosures where a high-tech "smoked-glass" aesthetic is desired.
• Automotive & Marine Dashboards: Custom gauge clusters, digital readout bezels, and secondary sensor covers that reduce daytime glare and improve nighttime readout contrast.
• Architectural & Scale Models: Tinted window panes for miniature scale buildings, modern architectural facades, and futuristic scale-model displays.

Usage Tips

• Protective Film Management (CRITICAL):
  • Leave the protective paper or PE film in place during all laser cutting, CNC routing, and drilling operations.
  • The protective mask prevents vaporized condensates, exhaust smoke, and hot slag from sticking to the glossy tinted surface. Peel off the film only after all cutting, edge deburring, and drilling steps are completed.
• Laser Power & Air Assist Calibration:
  • Because dark transparent acrylic absorbs infrared laser energy (10.6 μm) very efficiently, it cuts faster and at slightly lower power levels than pure white or opaque acrylic.
  • Maintain strong air assist (10 to 15 psi) during vector cutting to quickly extinguish flame flare-ups and prevent localized melting along the cut path.
• Drilling Recommendations: Use specialized plastic drill bits (with a 60° to 90° tip and negative rake) or dull the leading cutting edges of standard twist drills. Always clamp a scrap piece of solid wood or MDF beneath the sheet to support the bottom face and prevent breakout chipping as the bit exits.
• Solvent Cementing Protocol: Standard cyanoacrylate (superglue) releases volatile white vapors that cause unsightly milky "frosting" or hazing across transparent tinted surfaces. Use water-thin acrylic solvent cement (methylene chloride base) applied with a precision needle bottle to create invisible, chemically fused joint lines.
• Cleaning & Chemical Sensitivity: Never clean acrylic with rubbing alcohol, acetone, lacquer thinner, or ammonia-based glass sprays. Solvents cause immediate micro-crazing, stress cracking, and permanent clouding. Clean exclusively with lukewarm soapy water or specialized anti-static plastic cleaners and a clean microfiber towel.