Colorimetric Light Box Tester

The Colorimetric Light Box Tester provides a controlled and standardized lighting environment for accurate visual color evaluation. By simulating multiple standard illuminants, it eliminates variability caused by natural daylight and artificial lighting differences, making it essential for quality control, product development, and research in industries where color consistency is critical.

Application

(1) Visual color assessment and comparison of samples against standards in textiles, paints, plastics, printing, packaging, and automotive industries.

(2) Detection of metamerism by observing samples under different standard illuminants.

(3) Quality control to ensure consistent product color across batches or components.

(4) Setting and approving color standards between suppliers and customers.

(5) Evaluation of colorfastness tests under standardized viewing conditions.

(6) Research and development related to color formulation, material appearance, and product design.

(7) Comparison of color appearance under various simulated real-world lighting conditions.

(8) Ensuring regulatory compliance with international color evaluation standards.

Standards

(1) ISO 3664 – Viewing conditions for color assessment of images and objects.

(2) ISO 3668 – Textile – Methods for visual assessment of color differences.

(3) ASTM D1729 – Standard practice for visual appraisal of colors of materials.

(4) AATCC EP1 – Evaluation procedure for color in textiles.

(5) CIE – International standards for illuminants and color measurement.

(6) Additional regional or industry-specific color evaluation protocols.

Features

(1) Controlled Lighting Environment – Enclosed cabinet with neutral gray interior (e.g., Munsell N5 or N7) for consistent viewing conditions.

(2) Multiple Standard Illuminants – D65, D50, D75, CWF, TL84, A, and UV light sources. Optional: TL83, SPX35, Horizon, LED.

(3) Lamp Usage Monitoring – Hour meter for each lamp type to track usage and indicate replacement needs.

(4) Easy Operation – Individual switches to select and toggle between light sources; digital display shows selected illuminant and lamp hours.

(5) Durable Construction – Sturdy benchtop design suitable for laboratory and production use.

(6) Standard Compliance – Spectral characteristics conform to ISO, ASTM, and CIE requirements for visual color assessment.

Technical Parameters

Accessories

(1) Spare lamps for each standard illuminant.

(2) Calibration and verification color standards.

(3) User manual and operational guide.

(4) Optional extended illuminant kits (e.g., TL83, SPX35, Horizon, LED).

Test Procedures

(1) Place the sample inside the light box on the viewing platform.

(2) Select the desired standard illuminant using the control switches.

(3) Observe and compare the sample against standard color references.

(4) Record visual assessments or capture images if required.

(5) Repeat under other illuminants to detect metamerism or assess color consistency.

(6) Track lamp usage via hour meters and replace lamps when indicated.

Maintenance Information

(1) Clean interior surfaces and viewing platform regularly with a soft, lint-free cloth.

(2) Avoid direct exposure of lamps to moisture or dust to maintain spectral accuracy.

(3) Replace lamps according to the hour meter or when spectral output degrades.

(4) Verify illuminant spectral output periodically with certified reference standards.

(5) Ensure the digital display and control switches are functional before each use.