What is a Haze Meter Used for?

haze plastics unclear clarity haze meter

What is Haze?

Beyond the pollution and dust particles that are visible to us in the sky, haze is an important optical property to be considered. Haze is measured as the percentage of incident light scattered by more than 2.5° through the transparent materials.

How is Haze measured?

Haze meter is an instrument used to measure the haze value, light-transmitting and light scattering characteristics of transparent materials.

The lower the haze value, the higher the clarity.

There are many factors that cause light scattering such as:

  • Suspended particles or contaminants within a sample
  • Surface roughness due to crystallization
  • Inhomogeneity (density difference, fillers, pigments etc.)
  • Weathering or surface abrasion
  • Porosity of the material
  • Mechanical and chemical degradation
  • And many others

Where are Haze Meters used?

Haze meters are most commonly used in packaging Industry such as plastics and packaging films. It can also be used in other industries such as glass, beverages, pharmaceuticals (liquid), photovoltaic modules and cosmetics.

Generally, the haze meter is used in quality assurance (QA) applications, according to ASTM D1003, CIE C – which is the most significant standard used.

What are some Recommended Haze Levels?

The appropriate haze levels are dependent on the use case and material of your product. Here are some haze percentage values that you may consider.

Haze Percentage Values of Several Plastics

Polymer Name Min Value (%) Max Value (%)
Amorphous TPI, Moderate Heat, Transparent 2.00 2.00
Amorphous TPI, Moderate Heat, Transparent (Food Contact Approved) 2.00 2.00
Amorphous TPI, Moderate Heat, Transparent (Powder form) 2.00 2.00
Celllulose Diacetate-Gloss Film 0.70 0.70
Celllulose Diacetate-Integuard Films 0.00 4.00
Celllulose Diacetate-Matt Film 72.00 72.00
Cellulose Diacetate-Window Patch Film (Food Grade) 1.10 1.10
Cellulose Diacetate-Colored Films 2.10 2.10
Cellulose Diacetate-High Slip Film 0.70 0.70
Cellulose Diacetate-Semitone Films 63.00 63.00
ECTFE – Ethylene Chlorotrifluoroethylene 4.00 4.00
EVA – Ethylene Vinyl Acetate 5.10 5.10
EVOH – Ethylene Vinyl Alcohol 0.50 1.90
HDPE – High Density Polyethylene 6.00 6.00
Ionomer (Ethylene-Methyl Acrylate Copolymer) 4.00 27.00
LDPE – Low Density Polyethylene 1.30 27.50
LLDPE – Linear Low Density Polyethylene 0.80 28.00
PC – Polycarbonate, high heat 1.00 1.00
PETG – Polyethylene Terephthalate Glycol 0.30 0.60
PFA – Perfluoroalkoxy 4.00 4.00
PLA, Heat Seal Layer 2.00 2.00
PLA, High Heat Films 2.00 2.20
PMMA – Polymethylmethacrylate/Acrylic 1.00 96.00
PMMA (Acrylic) High Heat 2.00 2.00
PMMA (Acrylic) Impact Modified 1.50 7.20
PP (Polypropylene) Copolymer 2.00 2.00
PP (Polypropylene) Homopolymer 11.00 11.00
PS (Polystyrene) Crystal 2.00 2.00
PS, High Heat 1.00 1.00
PVC, Plasticized 3.00 5.00
SAN – Styrene Acrylonitrile 0.45 0.80
SMMA – Styrene Methyl Methacrylate 0.27 0.30

Source: Omnexus Special Chem

What can Maha Offer?

The best way to ensure the appropriate haze level and corresponding haze meter for use is to consult our team of professionals. Write into sales@mahachem.com or contact us at 6863 1808 today!

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