I found this on the Kaisercraft's website (but it still does not specifically say the albums are archival quality):
8. What is all the fuss about acid/Lignin free; and are Kaisercraft's products acid-free?
Anything that touches your photos should be acid-free and lignin-free, including paper, glue, markers and stickers. Why? Otherwise your photos will discolour and disintegrate more quickly than they would naturally. Products that are photo-safe will be labelled as such. Kaisercraft's patterned papers are photo friendly, however embellishments are not. If you look at many other manufacturers, most scrapbooking products these days are not acid-free or photo friendly.