The National Library collections contain unique and rare items held in perpetuity for the nation. All of them undergo a natural ageing process over time. We cannot stop the inevitable deterioration of these materials but we can control the rate at which it happens. Correct handling of books, manuscripts and other materials will aid in their preservation. In some instances we ask readers to use surrogate copies of items which are especially, rare, fragile or vulnerable. Our film and slideshow on 'Handling Collections' introduce readers to preserving NLI collections for future generations.