13 x 19" (A3+) Backing Card - 300gsm Museum Card - 330mmx483mm Quantity:100 Pack 5 with Calcium Carbonate and

5 with Calcium Carbonate and free of optical brighteners

This opaque British acid-free tissue is buffered with calcium carbonate to pH 7

Weight: 18gsm

lightweight masks provide good filtering from general dusts

binders and enclosures

13 x 19" (A3+) Backing Card - 300gsm Museum Card - 330mmx483mm Quantity:100 Pack 5 with Calcium Carbonate andThese premium backing cards are ideal for supporting your fragile documents, photos and prints when packing for long term storage. They are suitable for separating as interleaving sheets in folders, binders and enclosures. These backing cards will fit: Polypropylene Enclosure 13 x 19" For photographs, use one backing card beteen two photos to seperate them in the pocket, allowing x2 photographs per pocket. Made from KLUG Museum Card Ageing resistant