Finetech Engineering

Colour Matching Cabinet

Overview

Colour Matching Cabinet

The Finetech Engineering colour matching cabinet manufacturer India delivers a visual colour assessment light booth that provides standardised, repeatable lighting conditions for comparing colours of materials, products, and components. In a world where a slight shade difference between a moulded plastic part and its painted metal counterpart can cause a customer to reject an entire shipment, the colour matching cabinet is the first line of defence in your QC process.

The fundamental problem is that colours look different under different light sources. A plastic housing that matches its reference sample perfectly under factory fluorescent lights may look noticeably different under the customer’s showroom lighting or natural daylight. This phenomenon is called metamerism, and it is the single biggest cause of colour disputes between manufacturers and their customers. The colour matching cabinet eliminates this uncertainty by providing multiple standardised light sources in one controlled viewing booth, so you can check for metamerism before the product ships.

The cabinet interior is finished in neutral grey (Munsell N7) to eliminate colour bias from the surrounding environment. Samples are placed on the flat viewing surface and observed under each light source in sequence: D65 (simulated daylight at 6500K), TL84 (European retail store lighting at 4000K), CWF (US office fluorescent at 4150K), UV (to detect optical brighteners and fluorescent whitening agents), and F/A (incandescent tungsten at 2700K). If two samples match under all light sources, they are a true colour match. If they match under some but not others, metamerism is present and the colour formula needs adjustment.

Light Sources Explained - D65 vs TL84 vs CWF Light Source Difference & What Each One Simulates

Light Source

Colour Temperature

What It Simulates

When to Use

D65

6500K

Average north-sky daylight at noon – THE PRIMARY STANDARD for colour assessment

Always – D65 is the default light source. Start every assessment here.

TL84

4000K

European and Asian commercial store lighting (tri-phosphor fluorescent)

Export to Europe/Asia: checking how colours appear in retail environments

CWF (Cool White Fluorescent)

4150K

US commercial and office lighting

Export to USA: checking how colours appear in US retail and office settings

UV (Ultraviolet)

N/A

Black light – reveals optical brighteners and fluorescent whitening agents

Textiles, papers, and plastics that contain optical brightening agents

F / A (Incandescent)

2700K

Warm tungsten/filament lighting (household bulbs)

How colours look in home/residential environments

U30 / TL83

3000K

US warm white store lighting

US retail environments with warm lighting

D65 is always the primary assessment. Every visual colour assessment starts with D65. The other sources are secondary – used to check for metamerism and to simulate specific end-use lighting environments. Understanding the D65 vs TL84 vs CWF light source difference helps you select the right cabinet configuration for your export market.
What Is Metamerism? (And Why Your Customer Keeps Rejecting Colours)

What is metamerism in colour matching? Metamerism occurs when two colour samples appear to match under one light source but look visibly different under another. This happens because the two samples achieve their colour through different pigment combinations that reflect light differently across the spectrum. Knowing how to detect metamerism in plastic parts before shipment is critical for QC.

Example: A plastic moulding coloured with pigment blend X matches the reference card perfectly under factory fluorescent lights (CWF). The customer inspects the same moulding under daylight (D65) and sees a noticeable green shift. The colour formula is metameric – it matches under CWF but not under D65.

The colour matching cabinet catches metamerism before the product ships. By checking the sample under D65, TL84, CWF, and F in sequence, you identify metameric mismatches in the lab – not at the customer’s receiving dock.

How to Use the Colour Matching Cabinet

Step 1: Prepare the Viewing Environment

  • Switch off or block ambient room lighting – the cabinet must be the only light source
  • Ensure the interior is clean and free of coloured objects that could reflect and bias the assessment
  • Operator should wear neutral-coloured clothing (no bright colours near the viewing area)

 

Step 2: Place the Samples

  • Place the test sample and reference standard side by side on the neutral grey base
  • Position at the centre of the viewing area for even illumination
  • Ensure both samples are flat and oriented the same way (especially for textured or directional surfaces)

 

Step 3: Assess Under D65 First

  • Switch on D65 (daylight) – this is the primary assessment
  • View at approximately 45° angle (ASTM D1729 Method A) or 0° perpendicular (Method B)
  • Assess: do the two samples match in hue, chroma (saturation), and lightness?

 

Step 4: Check for Metamerism

  • Switch to TL84, CWF, F/A, and UV in sequence
  • Under each source, check: does the match hold, or does a colour shift appear?
  • Record which light sources show a match and which show a mismatch

 

Step 5: UV Check (If Applicable)

  • Switch to UV to check for optical brightening agents (OBAs)
  • If one sample fluoresces (glows) under UV and the other does not, they contain different whitening agents
  • This is especially important for white and near-white materials in textiles, paper, and packaging
Specifications

Parameter

Specification

Product Name

Colour Matching Cabinet (Visual Colour Assessment Light Booth)

Light Sources

D65 (6500K), TL84 (4000K), CWF (4150K), UV, F/A (2700K) – up to 6 sources (configurable)

D65 Illuminance

Approximately 1000–1200 lux on viewing surface (per ASTM D1729)

Interior Finish

Neutral grey (Munsell N7 or equivalent) on all interior surfaces

Viewing Area

Approximately 600 × 400 mm (model-dependent; larger models available)

Viewing Angle

45° (ASTM D1729 Method A) supported; adjustable sample tilt available

Lamp Switching

Individual switches for each light source; automatic sequential switching available

Lamp Hour Meter

Individual elapsed time counter for each light source – tracks usage for replacement scheduling

Warm-Up Time

None – instant start, no flicker

Exterior

Steel body, powder coated (neutral colour)

Power Supply

230V AC, single phase, 50 Hz

Standards Compliance

ASTM D1729, ISO 3664, BS 950 Part 1 & 2, DIN 6173, ANSI

Certification

ISO 9001:2015 certified manufacturing

Which Light Sources Does Your Industry Need?

Industry

Must Have

Recommended

Why

Plastics (moulded parts, pipes, packaging)

D65

TL84, CWF, F/A

Product appears in retail, commercial, and home environments

Rubber (footwear, automotive parts)

D65

TL84, F/A

Colour matching of soles, trims, and interior components

Textiles and garments

D65, UV

TL84, CWF, F/A

UV detects optical brighteners in white fabrics; TL84 for store display

Automotive (interior, exterior trim)

D65

TL84, CWF, F/A

Multi-component colour matching (plastic + fabric + paint)

Printing and packaging

D65 (or D50 per ISO 3664)

F/A, UV

Print proofing, packaging colour consistency, OBA detection

Paints and coatings

D65

TL84, CWF, F/A

Metameric matching under multiple end-use environments

Paper and paperboard

D65, UV

TL84

UV reveals fluorescent whitening agents in paper

Ceramics and tiles

D65

TL84, F/A

Showroom and home lighting simulation

Applications
Industries Served
Why Choose the Finetech Colour Matching Cabinet?

Up to 6 light sources configurable. D65, TL84, CWF, UV, F/A, U30 – select the sources your industry needs. Most competitors offer only 4 sources. Finetech cabinets can be configured with 4, 5, or 6 sources.

Munsell N7 neutral grey interior. The interior colour matters as much as the light sources. A white or coloured interior reflects colour onto your samples and biases the assessment. Finetech cabinets use calibrated neutral grey on all interior surfaces per ASTM D1729.

Individual lamp hour meters. Lamps degrade with use – a D65 lamp at 2000 hours does not produce the same spectrum as a new one. The built-in hour meters track each lamp independently, so you replace them at the right time for consistently accurate assessments.

Light booth manufacturer India. As a certified colour assessment cabinet manufacturer India, Finetech builds the cabinet, sources calibrated light sources, and provides replacement lamps directly. No intermediaries, no uncertainty about lamp compatibility.

Part of a complete QC solution. Colour is just one property. Finetech also manufactures the UTM (tensile), impact tester, MFI tester, Shore hardness tester, and all specimen preparation equipment. One supplier for your entire QC lab.

Related Products

Product

Why Related

Melt Flow Index Tester

Complementary incoming material QC – colour + MFR checked together on every batch

Universal Testing Machine (UTM)

Complementary mechanical testing

Shore D Hardness Tester

Complementary physical property testing

Humidity Chamber

For conditioning specimens under standardised temperature/humidity

Izod & Charpy Impact Tester

Complementary impact testing

Muffle Furnace

Ash content testing – filler loading affects colour in filled plastics

Common Questions

Frequently Asked Questions

A colour matching cabinet (also called a light booth or colour assessment cabinet) is used for visually comparing the colour of two or more samples under standardised lighting conditions. It ensures that colour assessments are consistent, repeatable, and independent of ambient lighting variations. It is the industry standard tool for incoming colour approval, production QC, metamerism detection, and customer dispute resolution.
What is D65 light source for colour assessment? D65 is a CIE standard illuminant that simulates average daylight (including the ultraviolet component) at a colour temperature of approximately 6500K. ASTM D1729 specifies D65 as the primary light source for visual colour assessment. It is considered the neutral standard because it represents the most commonly encountered natural viewing condition. Every colour assessment should start with D65.
What is metamerism in colour matching? Metamerism is the phenomenon where two colour samples appear to match under one light source but look different under another. It occurs because the two samples achieve their colour using different pigment combinations that reflect light differently at different wavelengths. The colour matching cabinet manufacturer India Finetech Engineering designs cabinets that detect metamerism by allowing you to view samples under multiple light sources in rapid succession.
At minimum, 4: D65 (mandatory), plus 2–3 secondary sources relevant to your market. For most plastic manufacturers, D65 + TL84 + CWF + UV covers domestic and export needs. Textile manufacturers should add F/A for home lighting simulation. 6-source cabinets provide the most comprehensive coverage.
D65 and other fluorescent lamps degrade over time, losing spectral accuracy. Most standards recommend replacement after 2000–5000 hours of use (depending on the lamp type and manufacturer’s recommendation). The built-in lamp hour meter tracks usage for each source independently. Replace lamps when the hour meter reaches the manufacturer’s recommended limit, or if visual assessment results become inconsistent.
No. The colour matching cabinet is a visual assessment tool - the human eye is the detector. For numerical colour measurement (L*a*b* values, Delta E), you need a spectrophotometer or colorimeter. The cabinet and the spectrophotometer serve complementary purposes: the cabinet detects visual differences including metamerism; the spectrophotometer quantifies the difference numerically.
ASTM D1729 specifies D65 as the primary viewing illuminant and is used across plastics, paints, textiles, and automotive industries. ISO 3664 specifies D50 (5000K, a slightly warmer daylight) and is used primarily in the graphic arts, photography, and printing industries. For plastics and rubber QC labs, ASTM D1729 with D65 is the relevant standard. The Finetech cabinet supports both.
Yes. A spectrophotometer measures colour at a single point and reports a number. The human eye sees the entire surface, detects texture effects, gloss differences, and surface irregularities that instruments miss. More importantly, the spectrophotometer cannot detect metamerism in the way the human eye can under switched lighting. Best practice is to use both: spectrophotometer for numerical QC limits, colour matching cabinet for visual approval and metamerism checks.