A range of folding boxboards which are blue/grey one side with a white reverse. For medium format storage box construction, phase boxes and folders. Sulphur & Lignin free. An alkaline ketene dimer size. Light fast (Blue Wool test: 5-6). Free of optical brightening agents, all qualities pass Photographic Activity Test. 1300 micron pH 8, 2.1% calcium carbonate buffer. We are pleased to offer a made-to-measure box making service using our complete range of archival boxboards (except corrugated, 650 and 1000 micron AFB). The minimum for two piece telescopic lid style with full or short lid is one. One piece formats demand the need for expensive dies and are therefore subject to a minimum of 200 boxes per size. For a free quotation please provide details of the type of quality required or an indication of items to be stored, the dimensions required and if more than one, the quantity.