This is opposed to materials that are translucent meaning some light is allowed to pass through or transparent which allow all light to pass.
Opaque plastic sheet meaning.
A plastic sheet forming technique in which the heated thermoplastic sheet is stretched over a mold and subsequently cooled.
When it comes to plastics some are opaque because of their chemical structure.
Legal documents bank letters or even official documents need to reach the end user or client safely.
Anything opaque is simply anything that blocks all light from passing through it.
For a better understanding this sciencestruck article lists the differences between transparent translucent and opaque materials.
This is calculated by measuring the percentage of the light which is absorbed by a sheet of paper.
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.
Light transmission capacity varies from object to object.
Striation rippling of thick parisons caused by a local orientation effect in the melt by the spider legs.
Opacity is that property of a substrate that resists the passage of light.
Whether it is for personal use or a commercial one opaque pouches or envelopes are a safer choice.