Protecting Heirlooms with Conservation Framing

Some things cannot be replaced. A painting your grandmother bought on holiday decades ago. A letter from a family member who is no longer here. A signed first edition. A set of war medals passed down through three generations. These are not just objects. They are pieces of personal history, and the way you frame them determines whether they survive intact for the next generation or quietly deteriorate behind glass.

Conservation framing is the difference. It is a set of materials and techniques designed specifically to protect irreplaceable items from the things that damage them: acid, ultraviolet light, moisture, and contact with unsuitable materials. At Harten, we have been doing this work for over 50 years, looking after everything from family photographs to museum collections. This guide explains what conservation framing involves, when you need it, and when standard framing is perfectly fine.

What is Conservation Framing?

Conservation framing means using materials and methods that protect artwork and objects from damage over time, without altering the item itself. Every material that touches or sits near the piece is chosen to be chemically stable, and every mounting technique is designed to be reversible so that the item can be removed in the future without any harm.

In practical terms, this means three things.

Acid-free materials. Standard mount board and backing materials contain acids that gradually migrate into artwork, causing yellowing, brown spots (known as foxing), and brittleness. Conservation-grade mount board, barrier layers, and backing are all acid-free and lignin-free, which means they will not break down or transfer harmful chemicals to the piece they are protecting.

UV-filtering glazing. Ultraviolet light is the main cause of fading and colour change in artwork and documents. Standard glass blocks very little UV. Conservation glazing, whether glass or acrylic, filters out 99% of UV light, dramatically slowing the fading process. Museum-grade glass goes a step further by also reducing reflections, so the piece is both protected and easy to see.

Reversible mounting. In standard framing, artwork is often attached using adhesive tape or glue that bonds permanently to the paper. If you ever want to remove the piece, you risk tearing it. Conservation mounting uses techniques like hinges made from Japanese tissue and wheat starch paste, or archival photo corners, that hold the work securely but can be removed cleanly at any point in the future. Nothing is done to the piece that cannot be undone.

When Conservation Framing is Essential

Not every piece needs conservation framing, but there are clear situations where it is the only responsible choice.

Valuable original artwork. If you own an original painting, drawing, or print with significant financial value, conservation framing protects both the piece and your investment. The cost of conservation materials is small compared to the value of the artwork, and the alternative is watching it degrade slowly over years.

Family heirlooms and irreplaceable documents. Letters, certificates, maps, vintage photographs, children's first drawings: anything that cannot be reprinted or repurchased. These items have value that goes beyond money, and once they are damaged by acid migration or UV fading, the damage cannot be reversed. Conservation framing stops that process before it starts.

Textiles and fabric items. Vintage textiles, embroideries, samplers, christening gowns, and wedding dresses are all susceptible to damage from acid contact and UV exposure. Fabrics are also vulnerable to humidity, which can cause mould growth and fibre degradation. Conservation framing controls all of these factors.

Medals, badges, and military memorabilia. Framed medals often include fabric ribbons and paper documents alongside the metal itself. The fabric and paper components need the same acid-free and UV protection as any other artwork, while the mounting must support the weight of metal objects without causing contact damage over time.

When Standard Framing is Fine

Conservation framing is not necessary for everything, and there is no need to spend more than the situation requires.

Mass-produced prints and posters. If the piece can be reprinted or replaced easily, standard framing does the job well. A high street poster that cost a few pounds does not need museum-grade glazing or acid-free mounting.

Pieces you plan to rotate. If you like to change your wall displays regularly, standard framing for each piece keeps costs proportionate. The items spend limited time in the frame, so long-term material degradation is not a concern.

Digital photographs you can reprint. If the original digital file exists, a replacement print is easy to produce. Standard framing is fine in this case, though UV-filtering glazing is still worth considering if the print hangs in direct sunlight and you want to avoid reprinting frequently.

The question to ask yourself is simple: if this item was damaged or faded beyond repair, could I replace it? If the answer is no, conservation framing is the right choice. If the answer is yes, standard framing will serve you well.

How Conservation Materials Protect Your Artwork

Understanding what each material does helps you appreciate why conservation framing works and why it costs a bit more than standard framing.

Acid-free mount board. Standard mount board is made from wood pulp that contains lignin and other acids. Over time, these acids migrate into the artwork, causing the characteristic yellow-brown staining you see on old prints left in cheap frames. Conservation mount board is either 100% cotton rag or chemically purified to remove all acids. It looks the same but behaves very differently over decades.

Barrier layers. Even with acid-free mounts, the backing board behind the artwork needs to be chemically neutral too. Conservation framing uses acid-free barrier layers between the artwork and the backing to create a clean environment inside the frame. This prevents migration from any direction.

UV-filtering glazing. Sunlight and artificial light both contain ultraviolet radiation that breaks down pigments and dyes over time. Conservation glazing blocks 99% of UV light while remaining optically clear. The difference is invisible to the eye but measurable over years of exposure. A piece behind conservation glazing will retain its original colours far longer than one behind standard glass.

Humidity buffering. Cotton rag mount board naturally absorbs and releases moisture, helping to stabilise humidity levels inside the frame. This is particularly important for watercolours, works on paper, and textiles, all of which are sensitive to moisture fluctuations. By buffering these changes, conservation materials reduce the risk of cockling, mould, and fibre damage.

The Conservation Framing Process at Harten

When you bring an item to us for conservation framing, the process starts with a careful assessment. We look at the condition of the piece, the materials it is made from, and any existing damage or previous framing that might need addressing. Sometimes an item arrives in a frame that has already caused acid damage, and part of the job is stopping that process and stabilising what is there.

We discuss the framing options with you, including mount colours, moulding choices, and the level of glazing protection. Conservation framing does not have to look clinical or institutional. The finished piece can be just as warm and attractive as standard framing. The difference is all in the materials, not the appearance.

The mounting is done by hand in our workshop. Every hinge, corner, or support is positioned carefully to hold the piece without stress. For three-dimensional items like medals or textiles, custom supports are built to distribute weight evenly and keep the item stable inside the frame.

We have been doing this work since the 1970s, looking after pieces for private collectors, families, and institutions. Our conservation framing page gives a full overview of our capabilities, or you can visit the workshop to discuss your piece in person.

For three-dimensional items that need more depth than a traditional frame allows, our box frames and acrylic display cases provide the space and protection these items need while still using conservation-grade materials throughout.

Our individuals framing service is built around exactly this kind of careful, personal work. If you have something irreplaceable that deserves proper protection, we would be glad to discuss how conservation framing can help.

Frequently Asked Questions

How much more does conservation framing cost than standard framing?

Conservation framing typically costs more than standard framing because the materials are higher grade. Acid-free mount board, UV-filtering glazing, and archival backing all cost more than their standard equivalents. For a typical piece, the additional cost is moderate and proportionate to the protection it provides. The exact difference depends on the size of the piece and the specific materials chosen. Your framer can quote for both options so you can compare directly.

Will conservation framing stop all damage to my artwork?

Conservation framing dramatically slows the processes that cause damage, but it does not stop them entirely. UV-filtering glazing blocks 99% of ultraviolet light, not 100%. Acid-free materials prevent acid migration but do not reverse existing damage. The goal is to give the piece the best possible chance of surviving in excellent condition for decades or longer. For most family heirlooms and valuable artwork, this level of protection is more than sufficient.

Can existing damage be repaired during conservation framing?

Conservation framing focuses on preventing future damage rather than repairing past damage. However, if a piece arrives with acid staining from an old mount or adhesive residue from previous mounting, these issues can sometimes be addressed during the process. For significant damage or restoration needs, a specialist conservator may be needed before framing. Your framer can advise on the best approach based on the condition of your piece.

Is conservation framing only for old or antique items?

No. Conservation framing is for anything irreplaceable, regardless of age. A photograph taken last year is just as worth protecting if it has personal meaning and cannot be reprinted. A child's first painting, a wedding certificate, a hand-drawn map: these are all candidates for conservation framing. The question is not how old the item is but how much it matters to you and whether you want it to last.

Where should I hang conservation-framed artwork?

Conservation framing gives you more flexibility in where you hang artwork, but some locations are still better than others. Avoid direct sunlight if possible, even with UV-filtering glazing. Avoid damp areas like bathrooms and kitchens where humidity fluctuates significantly. A well-lit room with stable temperature and humidity is ideal. If you want to hang a piece in a challenging location, discuss it with your framer so they can recommend the right level of glazing and environmental protection.