Why Heirlooms Are Different
Decorative objects are designed for display, often made from sturdy, modern materials. In contrast, archival items like old photographs, documents, and textiles are frequently delicate and made from materials that were never intended to last for a century.
They are vulnerable to invisible enemies in your home that a ceramic pot or a metal sculpture can easily withstand. Preventing damage is the core of preservation. While a broken vase can be replaced, a faded photograph or a crumbled letter is a memory lost forever. The goal is to slow down the natural process of decay by creating a safe environment for these irreplaceable treasures.
The Threat of Light and Heat
One of the biggest culprits in damaging family archives is light. The ultraviolet (UV) rays in sunlight and even indoor lighting can cause photographs to fade, paper to yellow, and fabrics to become brittle. Heat and humidity are equally damaging. Attics and basements, common storage spots, often experience extreme temperature fluctuations. This causes materials to expand and contract, leading to cracking and weakening. High humidity encourages mould growth, which can permanently stain and destroy paper and textiles. For best results, store your precious items in a cool, dry, and dark place with a stable temperature, like a closet in the main part of your house.
The Hidden Danger of Acid
You may think your heirlooms are safe inside a regular cardboard shoebox or a plastic sleeve, but these everyday containers can be silent destroyers. Many paper and plastic products contain acids that can migrate into your precious items, causing them to become yellow and brittle over time. This process is why old newspapers crumble to the touch. To properly protect your items, you need to invest in archival-quality, 'acid-free' materials. These products have a neutral pH level (7.0 or higher) and will not degrade your items. Look for boxes, folders, and tissue paper that are specifically labelled as acid-free and, for paper items, 'lignin-free' for maximum protection. Lignin is a natural compound in wood pulp that releases acid as it ages.
Choosing the Right Archival Materials
When selecting storage, it is important to distinguish between different types of archival materials. While most paper-based items like letters and documents benefit from buffered, acid-free paper, which contains an alkaline substance to neutralize acids, some items require a different approach. For instance, certain textiles like silk and wool, as well as some types of old photographs like cyanotypes, should be stored in unbuffered, acid-free materials to avoid potential chemical reactions. For plastic enclosures to store photos or negatives, avoid PVC (vinyl) at all costs and opt for inert plastics like polyester, polypropylene, or polyethylene. These materials are chemically stable and will not release harmful gases over time.
Handling and Long-Term Care
Proper handling is a simple but crucial step in preservation. The oils and dirt on your hands can cause permanent damage to delicate surfaces. Always wash your hands before touching old photos or documents, or better yet, wear clean cotton or nitrile gloves. Avoid using paper clips, rubber bands, or cheap adhesive tapes, as they can cause rust stains, tears, and harmful chemical reactions. Regular, gentle housekeeping can also prevent dust buildup, which holds moisture and can attract pests. By taking these simple precautions, you are actively managing the environment around your heirlooms and ensuring they remain safe.
