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Archival Folding Boards (AFB) 

A range of folding boxboards, slate brown one side, shite the other. Made for medium format storage box construction, phase boxes, and folders. Sulphur and lignin free. An alkaline ketene dimmer size. Light fast (Blue Wool test: 5-6). Free of optical brightening agents. All qualities pass Photographic Activity Test.

Item #	Description	Size
AFB01B	650 micron pH 7.9, 3.1% calcium carbonate buffer	29 x 40 in. (737 x 1016 mm)
AFB01	650 micron pH 7.9, 3.1% calcium carbonate buffer	40 x 58 in. (1016 x 1473 mm)
AFB02B	1000 micron pH 7.6, 2.6% calcium carbonate buffer	29 x 40 in. (737 x 1016 mm)
AFB02	1000 micron pH 7.6, 2.6% calcium carbonate buffer	40 x 58 in. (1016 x 1473 mm)
AFB03B	1300 micron pH 8.0, 2.1% calcium carbonate buffer	29 x 40 in. (737 x 1016 mm)
AFB03	1300 micron pH 8.0, 2.1% calcium carbonate buffer	40 x 58 in. (1016 x 1473 mm)