Opacity is that property of a substrate that resists the passage of light.
Opaque plastic sheet meaning.
Most people opt for opaque varieties.
This is calculated by measuring the percentage of the light which is absorbed by a sheet of paper.
Light transmission capacity varies from object to object.
This way the contents to be shipped stay secure.
Striation rippling of thick parisons caused by a local orientation effect in the melt by the spider legs.
When it comes to plastics some are opaque because of their chemical structure.
Not allowing light to pass through.
Anything opaque is simply anything that blocks all light from passing through it.
Whether it is for personal use or a commercial one opaque pouches or envelopes are a safer choice.
Transparent objects allow all the light to pass through them translucent ones allow partial light to pass whereas opaque ones allow no light to pass through.
Opaque definition not transparent or translucent.
For a better understanding this sciencestruck article lists the differences between transparent translucent and opaque materials.