What does COH mean in ENVIRONMENTAL

Coefficient of haze, abbreviated as COH, is a term used to measure the haziness or cloudiness of a transparent material. It is a measurement that determines the clarity or transparency of a substance in which ‘0’ represents perfect haze-free clarity and ‘1’ represents complete opacity.

COH is usually measured by using an instrument called a Hazemeter. This device projects light from its front panel onto a sample and then collects the radiation scattered by the sample from its rear panel. The ratio of these two measurements are recorded and used to quantify the level of haze present in the sample.

COH is commonly used to measure clarity in certain liquids such as beverages, pharmaceuticals, motor oils, etc. It is also used to evaluate the optical properties of plastics and film products like CPV films or LCD displays.

Your product's coefficient of haze (COH) can have a significant impact on consumer preferences for your product since higher levels of haziness generally indicate lower quality. To ensure your product reaches its highest potential, it's important to monitor and maintain an acceptable amount of haziness in your materials through regular testing with a Hazemeter.

Low coefficients of haze indicate less haziness within your material sample which generally equates to higher quality standards with respect to major factors such as colour, depth perception, distortion effects and image contrast. It often signifies superior clarity when compared to samples containing higher values of haziness.

High coefficients of haze indicate more haziness within your material sample which may be caused by various issues depending on your product category such as dust particles, foreign objects or other contaminants suspended in the substance itself. Higher levels of hazing can significantly reduce qualities such as colour saturation, focus accuracy and visual transparency so it’s important to keep an eye on it during routine tests.

You can conveniently test the coefficient of haze (COH) within your materials regularly with an accurate instrument known as a Hazemeter which measures how much light passes through or gets scattered by your sample material accurately and quickly based on approved testing protocols.

Most products have specific guidelines established regarding acceptable levels of Coefficient Of Haze for their respective categories. For instance, commercial beverage products must contain less than 0.005 coefficent of haze results while clear rigid PET packaging must not exceed 0.03 coefficient value for better visual clarity.