This polymer sponge works like a pencil eraser. The active ingredient is melamine (a nitrogen-rich organic base) that acts as a mild abrasive, lifting the staining material. As it does ...

"Magic Eraser" is actually just the well-known brand name for what is otherwise known as a melamine sponge. These sponges are made of a foam-like material that contains minuscule air pockets that ...

Take a flat eraser or a small sponge and slice a shallow ... Pre-stressed concrete is an ideal material for beam bridge construction; the concrete withstands the forces of compression well and ...