Crescent Select - Alpha-cellulose Conservation Matboard Conservation quality matboards, chemically treated to permanently eliminate the acids and lignins that can degrade the matboard and artwork. Acid-free and lignin free for a lifetime of protection. Crescent Select matboards are deeply pigmented for rich colour, so your framed artwork will look just as good today as it will in years to come. • Conservation grade surface paper for optimum bleed and fade resistance • 100% Virgin alpha-cellulose surface, core and backing paper • Buffered with calcium carbonate to an alkaline reserve of 3-5% pH 8.5-9.5 • Recommended for limited art prints, documents, photography and fine art prints