Crescent Berkshire mats are similair to Bainbridge's Canterbury line as an economical mat for non-archival framing.
A few choices have a brite white core.
These domestic standard quality paper mats are pH neutral. The board has been treated to slow down the breakdown that naturally occurs with any wood pulp product. A pH neutral mat will enhance your artwork for a number of years but eventually will fade and may cause acid stains wherever the mat touches the art. Standard pH neutral mats are not archival. 4 ply (1/16”)
Perfect for General Framing, Open Edition Reproductions, Posters