As useful as polyflute is in framing, it presents
a problem when used as a box making material, if
it is to be stored in an area that does not have
fire suppression capacity. In a fire, the hollow
design of the material accelerates ignition and
the plastic can also melt onto the contents of the
box. Traditional boxes made of thick paper board
have preformed well in fires. You could contact
Mark Vine of Conservation Resources U.K. 44 (0)
1865-747-755 in Oxford, to find ligin free boards
such as binders board. These boards could be scored with a knife and folded to form the shape
of the boxes. The seams can be covered with linen
tape to give the boxes strength and a more finished appearance. Such boxes should have a drop
side for removal of their contents or should be
fitted with a paper sling which will allow the
photos to be lifted out, safely.
Hugh
