Anything that does not allow permeation of water or other liquids. So think dense, thick, solid, smooth, or sealed surfaces
Examples:
metals:
stainless steel
steel
aluminum
chrome
vinyl
finished wood
laminate countertops
certain types of tiles or tiles that have been sealed to be nonporous (e.g. bathroom or kitchen tiles)
certain types of paper
glass
porcelain
Hard non-porous surfaces are materials that do not allow liquids or gases to pass through them. Examples include glass, metal, plastic, and sealed wood. These surfaces are often easy to clean and disinfect because they do not absorb contaminants.
Non-porous cleaners should not be used on porous surfaces because they can leave a residue that is difficult to remove and may cause discoloration or damage to the surface. It is important to use cleaners specifically designed for porous surfaces to avoid potential harm.
Some examples of rocks that absorb odors include activated charcoal, zeolite, and lava rocks. These rocks have porous surfaces that can trap and neutralize odors in the air.
Non-porous materials are those that do not allow liquids or gases to penetrate their surfaces. Examples include glass, metals (such as stainless steel and aluminum), plastics (like polyethylene and polypropylene), and ceramics. These materials are often used in applications where moisture resistance or hygiene is important, such as in kitchenware, medical instruments, and construction.
Acrylic is not inherently porous. However, if the surface of acrylic is scratched or damaged, it can become more porous and susceptible to stains or discoloration. Sealing or finishing acrylic surfaces can help prevent it from becoming porous.
pumice stone
Surfaces that are dark in color, rough, and have a low albedo (reflectivity) tend to absorb more heat. Common examples include asphalt, concrete, and dark-colored metals like iron. These surfaces absorb solar radiation and convert it into heat energy.
There are two types porous and non porous. You can also seel porous concrete to make it non porous.
Wet erase markers work on non-porous surfaces like glass, plastic, and laminated materials.
Sedimentary rocks such as sandstone are examples of porous materials.
White glue is strongest at room temperature when applied to moderately porous wood surfaces. It does not adhere well on shiny wood surfaces.
To get fingerprints from porous surfaces, you can lightly dust the surface with fingerprint powder using a brush. The powder will adhere to the oils in the fingerprint ridges, making them visible. Then, carefully lift the fingerprint using fingerprint tape or an adhesive lifter for further analysis or comparison.