Digital BW, The Print

It is doubtful that I will ever print enough silver
prints to use up a considerable investment in acid
free "buffered" mat board. Light Impressions
- and others – say that the calcium carbonate used
as a buffer MAY (emphasis is mine) cause color
shifts with certain materials, including pigment
based ink jet prints.

Two questions:

1 - Can anyone enlighten the group with empirical
or scientific evidence of buffering causing color
shifts (or "shades of gray shifts" as the case may
be)? Should we be concerned? Or is this just being
anal <VBG>?

2 - What about dye based inks? Any concerns here?

Thank you,
Steve T.