Thank you. This is what I thought at first but then loose fibres came up and confused me some more. I can't see what the difference would be between the two. Any suggestions would be very much appreciated.I think tottallyoff is correct in his interpretation. To clarify, bulk fibres would be those fibres that are used in the manufacture of this fibre blanket, but which have not yet been woven into a finished product. They would likely have been bought "in bulk."
Thank you again. I seem to be lagging behind all the time.I think that by "samples" they mean that when they do scientific tests for dangerous materials they use some "sample" fibres - which may come either from the fibre blanket or from loose bulk fibres. "Samples" in this case would be the material subject to testing.
Hope this helps!