CTB-012 Color Temperature Blue (Cooling) Filter

CTB-012 exemplifies a well-proportioned, all-purpose color temperature blue filter, with a measured approach to spectral shaping. Blue transmission stabilizes at 81.6 %, green at 66.3 %, and red at 56.7 %, yielding a 1.23 blue-to-green ratio and 1.44 blue-to-red ratio that feels natural while unmistakably shifting warmth toward daylight. The smooth falloff from blue through yellow to red-with no sharp valleys or peaks outside the blue region-makes it the practical workhorse for general professional lighting correction across theater, film, and broadcast contexts.

Key Advantages

• Balanced 1.44 Blue:Red Ratio - Provides genuine, visible color temperature shift without oversaturation-tuned for the perception curve of the human eye across tungsten-to-daylight conversion.
• Smooth Spectral Gradient Across Visible Spectrum - No dips or anomalies in yellow or green-ensures that color shifts feel gradual and cinematic rather than artificially filtered.
• Hard-Oxide Ion-Assisted Coating - Built for the rigors of rental stock, theater touring, and broadcast studio environments-resists scratching, moisture, and thermal shock without spectral drift.
• 81.6 % Blue Efficiency Without Brightness Loss - Minimal transmission loss allows standard-power fixtures to achieve proper color correction without LED or power-supply upgrades on set.
• Custom Formats and Substrates - Available in round, square, and free-form blanks from 5 mm to 450 mm, thickness 0.21-3.8 mm on Borofloat, soda-lime, Schott D263 T, or Corning Eagle XG.

Typical Applications

• Film and Television Color Grading - Correct tungsten practical lamps and flood lights during principal photography-ensures footage remains color-balanced across mixed lighting environments without post-processing overhead.
• Broadcast Studio Key and Fill Lighting - Transform aging tungsten arrays into proper 5600K daylight-balanced systems without retiring fixtures-extends equipment life while maintaining image quality.
• Theater Box Lighting and Washes - Shift warm ambience lighting toward cooler tones for mood changes, scene transitions, or to balance daylight spill from windows and doors.
• Architectural Interior Accent Lighting - Cool down warm tungsten spotlights and sconces to match modern interior design palettes-particularly effective in museums, galleries, and hospitality venues.
• Event and Live Production Lighting Rigs - Provide reliable, consistent color correction across touring shows, award ceremonies, and corporate events where mixed tungsten and LED sources must blend.

Rapid prototyping and reliable production supply for broadcast, theater, and film workflows. Provide your filter geometry and substrate preference for immediate quotation.