Mastering Beverage Appearance: The Critical Role of Colour and Haze Measurement

by Graintec Scientific June 1, 2026

In the competitive food and beverage sector, consumers rarely have the opportunity to taste a product before making a purchase. Instead, they buy with their eyes. Initial purchasing decisions are heavily influenced by overall visual appearance, with colour and clarity serving as primary sensory cues for freshness, flavour, and quality. In this digital age, consumers are highly empowered and increasingly demand naturally coloured products over artificial alternatives. This shift has altered base ingredients, making liquids inherently more volatile and prone to visual fluctuations during processing, transport, and storage.

For manufacturers, maintaining absolute visual consistency across batches is a major operational challenge. If an established beverage shifts in shade or exhibits unexpected cloudiness, consumers immediately perceive it as a flawed or lower-quality batch. Because correcting an off-colour product at the final packaging stage is incredibly costly and labour-intensive, measuring appearance at every phase of production is vital. Furthermore, stringent global regulatory bodies emphasize product-specific optical standards, meaning that precise quality control is not just about brand reputation—it protects a manufacturer’s license to operate.

The Challenge of Complex Optical Characteristics

Achieving accurate, repeatable visual data is complicated by the diverse optical profiles found across the beverage industry. Liquids generally fall into three categories:

Opaque Liquids: Characterized by high solids content and high Brix values (a measure of dissolved sugar content and specific gravity), these liquids block light and require reflective measurement techniques.
Translucent and Transparent Liquids: Possessing lower levels of suspended solids, these beverages allow light to pass through them, necessitating transmittance measurement modes.

To successfully monitor these varying matrices, processors must utilize advanced spectrophotometers that read exact spectral data values rather than relying on subjective human sight.

The Solution: HunterLab Vista L2 Transmission Spectrophotometer

This is where the HunterLab Vista L2 delivers a significant performance advantage. Engineered specifically for transparent and semi-transparent liquids, the Vista L2 is a high-accuracy transmission spectrophotometer that simultaneously measures both colour (absorbance) and haze (light scattering) in a single step.

The true innovation of the Vista L2 lies in its extended spectral range, which reaches up to 710 nm. Traditional transmission systems are often limited to 700 nm, where a major analytical bottleneck occurs: the human eye and basic sensors cannot cleanly distinguish between true colour absorption and liquid turbidity (cloudiness).

By pushing its measurement capabilities further into the near-infrared region—where the light absorption of most organic colour bodies drops to a minimum—the Vista L2 allows the instrument's detector to be dominated purely by light scattering. This creates an absolute, mathematical separation between true colour metrics and haze.

Multi-Dimensional Quality Control

Rather than deploying separate, costly instruments to check clarity and colour independently, quality control teams can extract comprehensive insight from one standalone device. This multi-dimensional functionality ensures that whether a producer is tracking the clarity of an ultra-filtered juice or monitoring batch repeatability in craft beer, the data remains traceably accurate.

By integrating the Vista L2 into the processing line, beverage manufacturers successfully navigate regulatory compliance, eliminate operator error, and protect the signature look of their product from the factory floor to the consumer's glass.

Ready to upgrade your testing capabilities? Contact Graintec Scientific today for formal quotes, machine specifications, or to arrange a product demonstration tailored to your production needs.

This article was adapted and comprehensively rewritten from the original publication, "A Better Method of Measuring Color and Haze in Beverages" available at HunterLab.