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Some examples of porous surfaces include paper, untreated wood, cardboard, sponge and fabric. These porous objects have pores or empty spaces that allow outside matter, such as water, air and particles, to penetrate beyo... More »

Non-porous surfaces include glass, processed metals, leather and plastics, and they are further divided into rough and smooth surfaces. Non-porous smooth surfaces include glass and painted or varnished surfaces. Non-poro... More »

The word "porous" refers to a material that has pores, or holes in its surface; some examples of porous materials include sponges, pumice stones and cork. Some porous materials have more noticeable pores than others, and... More »

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Common examples of solids are wood, sand, ice, bricks and steel. Examples of liquids include water, blood, wine, coffee and rubbing alcohol. Some common gases are hydrogen, helium, propane, water vapor and gaseous nitrog... More »

Tempera paint works well on wood as well as on papier mâché, cardboard, paper or glass. When mixed with egg yolk, tempera paint becomes even thicker and glossier and applies well to wood. More »

Reflection from rough surfaces, such as asphalt, paper and clothing are examples of diffuse reflection. In diffuse reflection, light rays are scattered randomly at different angles from the reflecting surface. More »

Block printing is using a carved piece of wood or other type of block to imprint an image on fabric or paper. In the early days of printing, it was used to print entire books. More »