OPACITY TEST FOR PVC PIPE

Theory Of Measuring Opacity Of Rigid Plastics

Light transmission property of the plastic films and rigid plastics are quite difficult to measure and define. As per the current terminology, the materials comprise with the terms such as clarity, total transmittance, transparency, diffuse transmittance, see through resolution distance, opacity, turbidity, haze, translucency, hiding power, etc. In addition to this, several types of measurement are done using the transmission detecting testing devices. The part of the transmission light is scattered in a forward direction outside a certain angle with respect to the normal incident ray. Other methods determine the quantity of resolution in an image which is formed with a particular object with the sheet or film that are placed between the image and object. These measurements describe the optical properties of the material in accordance with the transmittance light of the material.


What is Opacity?

Opacity is that property of a substrate that resists the passage of light. This is calculated by measuring the percentage of the light which is absorbed by a sheet of paper. With a single permit for the light source through your material, the system measures transmission level of the material from 0 to 100 units that help to calculate the percentage of opaqueness and percentage of transparency of the material.

As per the standards, the opacity testing machine is designed to measure the opacity, the percentage of transmittance light which passing through the sample and deviates from the incident ray by forward scattering more than the average. This transmission value bears little relation to the visibility of distant objects that are seen through the samples.

Formula to Calculate Opacity

Opacity of the Material = 100% – Transmittance

For example, if the transmittance of the material is 25.6%, then the Opacity of the material will be,

Opacity = 100% – 25.6%

= 74.4%

One Stop Solution to Calculate Opacity of Rigid Plastics.


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