From memory (I used to work in the analytical
labs at a pharmaceutical company) high density
polyethylene (HDPE) is a fairly common one, as is PVC (poly
vinyl chloride). Something else I remember is that some
products used to have different plastics on the
inside/outside of blister packs....ie there were two layers on
each piece of plastic.<br><br>Interesting that you
were asking for near-IR spectra.......what are you
after? I should imagine that someone somewhere must have
done something like this........try
<a href=http://www.bids.ac.uk/ target=new>http://www.bids.ac.uk/</a> <a
href=http://www.janet.idealibrary.com/
target=new>http://www.janet.idealibrary.com/</a>
<a href=http://www.rsc.org/is/journals/j1.htm
target=new>http://www.rsc.org/is/journals/j1.htm</a> or <a
href=http://www.iop/org/EJ/welcome target=new>http://www.iop/org/EJ/welcome</a>
and try
searching through some electronic journals. Hope these are
of some use to you.....let me know how you get
on?<br><br>You could also try out some company websites like
<a href=http://www.abbott.com/ target=new>http://www.abbott.com/</a> <a
href=http://www.pfizer.com target=new>http://www.pfizer.com</a> and so
on.......<br><br>Best of luck, and don't forget to let us know how you
get on!