How to Care for Original Artwork: A Collector's Guide

Why This Matters

An original oil painting or watercolor can last 500 years if cared for properly — or deteriorate in 20 years if it isn't. The difference is largely about light, humidity, and how the work is framed and stored.

Light: The Biggest Enemy

Ultraviolet light causes fading and degradation in virtually all art materials. Even natural daylight contains significant UV.

Rules for display:

Acceptable light sources:

For seriously valuable work, consider a conservator-grade UV-filtering film on your windows.

Humidity and Temperature

The ideal environment for most art:

Fluctuations are more damaging than consistent conditions outside this range. A canvas that expands in summer humidity and contracts in winter dryness — repeatedly, over years — will eventually crack.

Avoid:

Framing Works on Paper

Watercolors, drawings, prints, and photographs on paper are more vulnerable than oil paintings on canvas. Proper framing is essential:

The mat must be acid-free (also called conservation or archival mat). Acidic mat will yellow and damage the paper over years. Ask your framer specifically for acid-free materials.

The backing should also be acid-free board.

Glass or acrylic should be UV-filtering for any work that will be displayed.

The work must not touch the glass — the mat creates space between them.

Cleaning

Never clean an original artwork yourself unless you are a trained conservator.

For dust on the frame: a soft dry brush. For dust on the surface of a varnished oil painting: consult a conservator.

Attempting to clean unvarnished paint, watercolor, or works on paper can cause irreversible damage.

Varnishing Oil Paintings

A fresh oil painting should not be varnished for at least 6–12 months — the paint needs time to cure fully. Once cured, a thin coat of picture varnish (removable) protects the surface and saturates colors.

Use removable varnish — this allows future conservators to remove and re-varnish as needed.

Storage

If you need to store artwork:

For long-term storage of valuable work, a professional art storage facility with climate control is worth the cost.

Insurance

If you own original art of significant value, insure it. Standard home contents insurance often has low limits for art. Specialized art insurance policies cover accidental damage, theft, and transit.

Get works professionally appraised — especially if they are more than 5 years old or by an artist whose market has grown since you bought.