What Is Urushi? A Complete Guide to Natural Urushi Lacquer
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What Is Urushi? A Complete Guide to Natural Urushi Lacquer
Urushi is a natural lacquer made from the sap of the lacquer tree, Toxicodendron vernicifluum. It is also commonly called natural lacquer, raw lacquer, raw urushi, or ki-urushi.
Unlike modern synthetic varnishes, urushi is a plant-based material. When applied under suitable temperature and humidity conditions, it cures into a hard, durable, water-resistant and highly lustrous surface.
Urushi has been used for thousands of years in East Asia for lacquerware, furniture, decorative arts, adhesives, protective coatings, kintsugi, maki-e, raden, and many other traditional craft techniques.
But what exactly is urushi? Where does it come from? How is it harvested? And what type of urushi should artists choose?
This guide explains urushi from the tree to the finished lacquer.
What Is Urushi Made From?
Urushi is made from the natural sap of the lacquer tree, scientifically known as Toxicodendron vernicifluum.
The fresh sap collected from the tree is called raw urushi or raw lacquer. It may appear pale grey, milky, cream-colored or light amber when freshly collected.
The main natural component responsible for urushi’s curing properties is urushiol. When urushiol reacts with oxygen in the presence of natural enzymes, the lacquer gradually cures into a strong protective film.
This process is different from ordinary paint drying. Urushi does not simply dry because its liquid evaporates. It undergoes a natural chemical reaction.
Where Does Urushi Come From?
Urushi comes from lacquer trees cultivated in East Asia, especially in China, Japan, Korea and other parts of the region.
The lacquer tree is not the same as a rubber tree or an ordinary resin-producing tree. Its sap contains urushiol, which gives urushi its unique curing properties.
China has a very long history of lacquer production and lacquer craftsmanship. Archaeological discoveries in the Yangtze River Delta have identified lacquer use dating back approximately 8,000 years.
Over time, lacquer technology spread throughout East Asia. Different regions developed their own techniques, tools, colors, decorative styles and polishing methods.
Japan is internationally famous for refined lacquer craftsmanship, including maki-e, kintsugi and highly polished lacquerware. However, Japanese lacquer craftsmanship and the geographical origin of raw lacquer are two different questions.
Japanese industry sources have reported that approximately 97% of the urushi used in Japan is imported from abroad, mainly from China. This reflects the close connection between Chinese raw lacquer production and the wider East Asian lacquer industry.
How Is Urushi Harvested?
Urushi is collected directly from the trunk of a living lacquer tree.
A craftsperson carefully makes a small incision in the tree’s bark. Fresh lacquer sap then slowly emerges from the cut and is collected for further processing.
The basic process is:
- A suitable lacquer tree is selected.
- The trunk is carefully cut by hand.
- Fresh lacquer sap emerges from the incision.
- The sap is collected in a small container.
- The raw urushi is filtered, refined and prepared for different applications.
Watch How Natural Urushi Is Collected
The following video shows the traditional collection of fresh raw urushi from a lacquer tree in China. You can see the incision being made in the tree and the fresh sap emerging from the trunk.
This is what natural raw urushi looks like before it is processed into the different types of lacquer used for kintsugi, maki-e, raden and lacquerware.
What Does Fresh Raw Urushi Look Like?
Freshly collected urushi does not necessarily look like the glossy black or red lacquer seen on finished lacquerware.Fresh raw urushi is a milky‑white liquid. Its surface turns reddish‑brown after oxidation upon exposure to air.
Is Urushi the Same as Tree Sap?
Urushi is a type of natural tree sap, but not all tree sap is urushi.
Urushi specifically comes from lacquer trees and contains urushiol. This chemical composition gives it its unique curing properties.
What Is Urushi Used For?
After collection and processing, urushi can be used in many traditional and contemporary craft applications.
Kintsugi
Urushi is used as an adhesive and coating material in traditional kintsugi repair.
It can help bond broken ceramic pieces, attach repair materials and create a surface suitable for later decoration with gold, silver or other powders.
Maki-e
In maki-e, wet urushi is used as an adhesive or decorative medium for applying gold powder, silver powder and other materials.
It can also be used as a base layer, drawing medium or protective top coat.
Raden and Mother-of-Pearl Inlay
Urushi is used to attach and protect mother-of-pearl, shell, eggshell and other inlay materials.
It can function both as an adhesive and as part of the layered lacquer surface.
Traditional Lacquerware
Urushi can be applied to wood, bamboo, paper, cloth, metal and other prepared surfaces.
Multiple layers may be applied and polished to create a smooth, durable and luminous finish.
Protective and Decorative Coatings
Natural lacquer can protect an object while also giving it a deep visual quality that is difficult to reproduce with ordinary synthetic coatings.
What Is the Difference Between Raw Urushi and Refined Urushi?
Raw urushi is the natural lacquer collected from the tree before it has been fully processed for a particular application.
Refined urushi has usually been:
- Filtered
- Stirred
- Adjusted for consistency
- Processed for a specific purpose
- Prepared for easier application
Different grades and processing methods can influence:
- Drying behavior
- Hardness
- Adhesion
- Transparency
- Color
- Surface smoothness
- Suitability for different craft stages
The urushi used for a base layer may not need exactly the same properties as the urushi used for a final polished surface.
How Do You Choose the Right Natural Raw Urushi?
There is no single urushi that is automatically best for every artist.
The right choice depends on:
- Your technique
- Your working environment
- Whether you are doing kintsugi, maki-e or lacquerware
- Whether you need faster or slower curing
- Whether you need high transparency
- Whether you are applying a base coat or finishing layer
- Your budget
- The quantity you need
Some artists prefer a higher-grade urushi for demanding finishing work. Others need a more economical grade for base layers, practice, large surfaces or production work.
Our Natural Raw Urushi Selection
We offer eight different grades of natural raw urushi, allowing artists to compare and choose according to their technique and budget.
Our selection includes both economical options and higher-grade options. This gives artists more flexibility than being limited to only one or two standard choices.
Whether you are a beginner testing urushi for the first time or an experienced artist looking for a specific grade, you can choose a material according to your actual needs.
Explore our natural raw urushi selection:
https://urushilacquer.com/products/natural-raw-urushi-lacquer-ki-urushi-kintsugi
What Is Colored Urushi?
Colored urushi is natural lacquer mixed with pigments or other coloring materials.
Traditional colored lacquer is often made by combining natural lacquer with mineral pigments. The color, opacity, depth and final appearance depend on the pigment, the lacquer base and the application process.
Colored urushi can be used for:
- Lacquerware
- Maki-e
- Decorative painting
- Colored base layers
- High-gloss polishing
- Background colors
- Pattern making
- Traditional lacquer decoration
Some artists prepare colored urushi themselves by mixing lacquer with mineral powders. This gives them control over the color, but it also requires additional time, tools and experience.
Our Ready-Made Colored Urushi
We offer more than twenty color options of ready-made colored urushi.
These colors are prepared by combining urushi with mineral pigments, making them convenient for artists who want to begin working directly without spending additional time mixing and testing pigments.
Ready-made colored urushi can help artists:
- Save preparation time
- Reduce pigment waste
- Avoid repeated color testing
- Work more efficiently
- Focus on painting, decoration and polishing
- Reduce the cost of preparing small quantities of many colors
Instead of purchasing raw urushi and separate mineral powders for every color, artists can select the colors they need directly.
Explore our colored urushi collection:
https://urushilacquer.com/products/colored-urushi-lacquerware-art-polishing
What Is Clear or Transparent Urushi?
Clear urushi is a relatively transparent form of natural lacquer.
It is useful when the artist wants to preserve the appearance of the underlying material or create a transparent protective layer.
Clear urushi can be used for:
- Transparent lacquer finishes
- Natural wood surfaces
- Raden and mother-of-pearl inlay
- Decorative layering
- Kintsugi-related work
- Lacquerware finishing
- Preserving the visual depth of an underlying design
The final appearance of clear urushi depends on the thickness of the layer, the substrate, the curing process and the number of applications.
Explore our clear transparent urushi:
Clear Transparent Urushi Lacquer
What Is Black Urushi?
Black urushi is a black-colored natural lacquer used widely in traditional lacquer art.
It can be used for:
- Black lacquerware
- Kintsugi repair
- Line drawing
- Base coating
- Decorative work
- Polishing
- Creating contrast with gold, silver and colored lacquer
Black urushi is especially useful when an artist wants a deep, dark background or a strong contrast between the lacquer surface and metallic decoration.
Explore our black urushi:
Black Urushi Lacquer — Kuro-Urushi
Is Urushi Safe to Use?
Urushi contains urushiol, which can cause an allergic skin reaction similar to poison ivy exposure.
Fresh and uncured urushi should be handled carefully.
When working with urushi:
- Avoid direct skin contact.
- Wear suitable protective gloves.
- Work in a well-ventilated area.
- Avoid touching your face or eyes.
- Keep tools and materials away from food.
- Follow appropriate curing and storage procedures.
- Do not assume that cured lacquer and uncured lacquer have the same safety characteristics.
- If you develop a rash or irritation, stop working and seek medical advice if necessary.
Artists who are new to urushi should learn the basic handling and curing requirements before beginning a project.
Why Choose Urushi from China?
China has a long history of lacquer production, lacquerware and lacquer technology. It is also an important source of natural raw lacquer for the wider East Asian lacquer industry.
Buying directly from a China-based specialist supplier can offer several practical advantages:
- More natural raw urushi grades to compare
- More ready-made colored urushi options
- Access to raw materials and traditional tools in one place
- Competitive pricing
- Flexible quantities
- Access to less common materials
- Direct communication with a specialist supplier
- Educational support for artists learning urushi techniques
Our goal is not simply to sell lacquer. We want to make traditional lacquer materials easier to understand and easier to access for artists, restorers and makers around the world.
Frequently Asked Questions About Urushi
What is urushi?
Urushi is a natural lacquer made from the sap of the lacquer tree, Toxicodendron vernicifluum. It is also called natural lacquer, raw lacquer or ki-urushi.
Is urushi a tree sap?
Yes. Urushi is collected as sap from lacquer trees. The fresh sap is processed into natural lacquer for traditional crafts.
What is raw urushi?
Raw urushi is freshly collected natural lacquer before it has been fully refined or prepared for a specific application.
What tree produces urushi?
Urushi comes primarily from the lacquer tree, scientifically known as Toxicodendron vernicifluum.
Is urushi the same as Japanese lacquer?
Japanese lacquer is usually called urushi, but the raw material is not exclusive to Japan. Japan has a famous lacquer-art tradition, while much of the raw urushi used in Japan is imported, mainly from China.
What is urushi used for?
Urushi is used for kintsugi, maki-e, raden, lacquerware, decorative coatings, adhesives and protective finishes.
What is ki-urushi?
Ki-urushi means natural raw urushi. It is the basic uncolored lacquer material used in many traditional lacquer techniques.
What is colored urushi?
Colored urushi is natural lacquer mixed with pigments, often mineral pigments, to create different colors for lacquer art and decoration.
Does urushi dry like ordinary paint?
Not exactly. Urushi cures through a chemical reaction involving oxygen, urushiol and natural enzymes. Suitable temperature and humidity are important.
Can beginners use urushi?
Yes, but beginners should first learn how to handle urushi safely and how to control the curing environment. Starting with a small quantity is usually a sensible approach.
Explore Natural Urushi Materials
If you are looking for natural lacquer for kintsugi, maki-e, raden, lacquerware or other traditional techniques, explore our urushi materials:
- Natural raw urushi: Eight grades for different techniques and budgets
- Colored urushi: More than twenty ready-made color options
- Clear urushi: For transparent finishes and inlay work
- Black urushi: For black lacquer surfaces, line work and polishing
We also provide traditional lacquer-art materials, tools and educational resources for artists and makers.
Explore our urushi lacquer collection:
Urushi Lacquer Materials and Tools