On page 32 of the catalogue, they give an excellent example of what makes a 'safe' scrapbook when it comes to your photos, papers, and even the journaling.
There are so many family photo albums at my parents' home and at my grandparents' that have photos and memorabilia that is faded and stained and no longer sticking to the album page. Photo albums and the memories and souvenirs that they hold, and especially the time
taken to put them together, is something that should be treasured for years and years to come - so choosing good photo safe supplies is essential!