Colored folder stock

Our herbarium uses colored folder stock to house specimens.  The color
coding indicates geographic area.  Individual specimens are interleaved
with acid-free/lignin-free paper and all specimens from one species are
then placed in a color coded folder.  There are several different types
of folder stock used.  Some are buffered to a neutral or alkaline pH.
None of the colored stock is acid-free and lignin-free.  Does anyone
know of a source for colored acid-free/lignin-free folder stock?  Anyone
have any ideas for alternatives to colored folder stock?

Linda Hee
Bishop Museum Conservation Services

                                  ***
                  Conservation DistList Instance 7:63
                  Distributed: Thursday, March 3, 1994
                        Message Id: cdl-7-63-008
                                  ***