The “Opening of Color” in Traditional Lacquerware

Collectors of traditional lacquer pieces sometimes notice something interesting. The color and depth of a lacquer surface can appear slightly different over time compared to when the piece was first finished.

In the lacquer world, this is often described as the piece “opening its color.” While this phrase is poetic, it reflects real material changes that occur in natural lacquer.

What is Natural Lacquer?

Traditional lacquer used in East Asian crafts is made from the sap of the lacquer tree (Toxicodendron vernicifluum). This natural resin, commonly called urushi, has been used for thousands of years in Chinese, Japanese, and Korean lacquerware.

Unlike modern synthetic coatings, natural lacquer continues to cure and stabilize even after the finished piece leaves the artist’s workshop.

Why the Color Can Change Over Time

Natural lacquer undergoes a slow chemical process known as oxidative polymerization. During this process the lacquer hardens further and becomes more stable as it reacts with oxygen and light.

Because of this gradual maturation, collectors may observe subtle changes such as:

• Slightly deeper or richer color tones

• Increased surface gloss

• Greater visual depth in layered lacquer work

• Clearer contrast between pigments and layers

These changes are typically slow and subtle, developing over months or years rather than appearing suddenly.

The Role of Use and Environment

Light exposure, air, and gentle handling can also influence the appearance of lacquer over time. Oils from the hands and normal use can gradually polish the surface, increasing its sheen.

For this reason, some collectors believe lacquer pieces gain character through use, much like leather developing a patina or cast iron seasoning improving with time.

A Living Craft Tradition

Traditional lacquerware is often described as a “living surface.” The artwork does not completely stop evolving once it leaves the studio. Instead, it continues a slow process of curing, aging, and interaction with its environment.

In this way, the owner becomes part of the object’s ongoing story.

Craft Terminology

The phrase “opening color” is not a strict scientific term. It is a traditional way craftsmen describe the gradual visual maturation of lacquer surfaces.

While the changes are usually subtle, many collectors appreciate this quality as part of the charm of natural materials and traditional craftsmanship.

References

Getty Conservation Institute – Research on Urushi Lacquer Chemistry and Aging
https://www.getty.edu/conservation/publications_resources/pdf_publications/pdf/urushi3.pdf

Influence of Natural Light Aging on Chinese Lacquer Coatings
https://www.mdpi.com/2079-6412/15/10/1229

History and Tradition of Japanese Urushi Lacquerware
https://kogeistyling.com/pages/history-tradition-of-japanese-lacquerware