Chipboard is made by bonding together wood particles with an adhesive under heat and pressure to form a rigid board with a relatively smooth surface. Chipboard is available in a number of densities; normal, medium and high-density. Normal density is fairly soft and 'flaky', high-density is very solid and hard (often used for worktops and fire doors) - medium density is somewhere in between.
Chipboard is used for the backing of notepads, backing of stacks of business forms, and in scrapbooking used to ship stacks of sheets of paper to scrapbook stores. Some manufacturers are making acid-free/lignin free chipboard specifically for use in making scrapbook pages. Chipboard can be used to create thickness in scrapbook page embellishments and monogram letters