Those of you with British Military or Civil Services in your backgrounds may recognize the allusion! ;) Known to the world at large as Izal Medicated Strong Toilet Tissue*, many of you will recognize it as the standard of the 1950's school and public lavatory. Some may even have used it at home (my grandparents had it in the house in Kirkcaldy - I always thought it was a religious thing... ). Be that as it may. It closely resembles tracing paper, or greaseproof paper, has NO absorbent properties whatsoever, and is better used for packing small items for moving house than any hygiene uses... After discussions earlier in the week on another group, I mentioned it to DH, and guess what he bought me? Yessss! One roll of Government Unsinkable! (RAF loos had it with 'Property of Her Majesty's Government' printed on every sheet!). I now need to get him to cut it up for me. Thank you Big Sis for reminding me of it's No 1 sewing use: as strips of tissue paper for sewing into the seams of slippery fabrics to help prevent creep!
Take one roll of Govt Uns and slice into 4 doughnuts: use in said seams! Comes with handy perforations to tear to length! rips out of seams easily!
I remember being sent down to the wood work room at school with a few rolls to be sliced up for the sewing teacher. Wise lady, that!