Seems somewhat off-topic to me but I shan't make that call.

FWIW: Conservation of old materials is a specialist area, if in doubt do nothing. Your local museum might be able to advise. At a guess: keep out of bright sunlight, control humidity, don't fold (perhaps don't even roll up). Remember Hippocrates: first do no harm.

Conservation of old materials is a specialist area, if in doubt do nothing. Your local museum might be able to advise. At a guess: keep out of bright sunlight, control humidity, don't fold (perhaps don't even roll up). Remember Hippocrates: first do no harm.