URUSHI

URUSHI DEFINED
 
Urushi is derived from the sap of the urushi (or lacquer) tree.  In authentic Kintsugi, the adhesive sap obtained from the lacquer tree (urushi) is employed to assemble the shattered fragments.
 
URUSHI HARVESTING
 
The custodians of the urushi collection are guardians of an invaluable intangible cultural heritage dating back centuries.  Working closely with skilled artisans, we ensure the acquisition of urushi lacquer of the highest quality.
The journey to obtain this lacquer commences with a harvester delicately peeling the tree bark using the specialized Kamazuri tool, a process known as Kamazuri.  Following this, a precise incision, about five millimeters deep, is made into the urushi tree's bark using a Urushi Kanna.
Subsequently, elongated cuts, termed Henzuke, are meticulously created at regular intervals above the initial incision.  The tree naturally responds by releasing sap to mend these cuts, and the droplets of sap collected from these incisions serve as the raw material for urushi.  It's essential not to collect sap below the third or fourth cut from the bottom to maintain the tree's natural sap flow.  Harvesters employ a Hera, a tool that scrapes the sap into a Takappo, a designated container.
This meticulous process is replicated across numerous trees, with harvesters filling their containers and then using a Gonguri, a tool that facilitates the transfer of urushi lacquer from the Takappo to a larger barrel. 
For each set of cuts made on a tree, a urushi gatherer patiently waits for three days to allow the tree to recover.  Remarkably, a urushi gatherer can extract sap from hundreds of trees throughout the season. 
Upon receiving the lacquer from the harvesters, it is left to rest, allowing a gradual evaporation of its water content.  Stirring it with a large stick enhances its viscosity.  This careful process ensures the uniform distribution of the lacquer and aids in further water evaporation.  Typically, this refining stage occurs at a specialized lacquer refiner’s workshop.
Following this, refined lacquer may be enriched with pigments, such as red or black, and meticulously blended using a paddle or stick to craft colored urushi.  The mixture is then left to rest for a few more days, allowing the pigments to amalgamate thoroughly with the urushi.  Subsequently, the blend is strained through washi paper to eliminate any impurities. 
After undergoing these multiple stages, the refined lacquer is now ready for storage and application.
 

HELP and guide

Urushi Rash and Additional Health Consequences

Urushi lacquer, derived from the sap of the urushi tree, is a traditional Japanese lacquer.
The compounds present in urushi can trigger allergic reactions in those who come into contact with it, commonly known as "Urushi rash" or urushi dermatitis. This condition typically presents as skin reactions, including redness, itching, swelling, and the formation of blisters in the exposed area.
Symptoms may also manifest in other parts of the body. In severe cases, ulcers and systemic allergic reactions such as difficulty breathing can occur. Additionally, there have been reports of hypersensitivities affecting areas beyond the skin.

Technical Specifications of Urushi Lacquer and Its Constituents

Urushi lacquer comprises numerous compounds, with urushiol being the most noteworthy. Recognized for its irritating and allergenic properties, urushiol is an oily compound capable of eliciting a robust immune response in the affected area. Additionally, the lacquer contains other compounds like lignans and phenolic compounds, contributing to the overall health effects associated with exposure.

Protection and precaution

Taking necessary precautions is crucial when working with urushi lacquer to prevent exposure and the accompanying symptoms.
Protective Equipment:
Utilize suitable protective equipment, including gloves, long-sleeved shirts, pants, and safety goggles, when exposed to urushi lacquer.
Ventilation:
Conduct activities in well-ventilated spaces or outdoors to prevent the buildup of volatile compounds in the air.
Minimizing Contact:
Refrain from direct contact with urushi lacquer using uncovered hands, and employ protective clothing while working with it.
Hygiene Practices:
Wash hands thoroughly after exposure, and ensure that any clothing in contact with urushi lacquer is cleaned separately from other garments.

Guidelines for Skin Exposure

If you happen to encounter urushi lacquer on your skin, adhere to these instructions:
Rinse Skin:
Immediately wash the affected area with ample lukewarm water, avoiding hot water to prevent pores from opening. Use a mild soap, and consider applying cooking oil to effectively remove urushi lacquer from the skin.
Furthermore, make certain that when drying wet areas, you wash the towel or cloth thoroughly and refrain from reusing it until it has been cleaned, as it may retain trace amounts of urushiol.
Avoid Scrubbing:
Refrain from scrubbing the impacted area, as it may spread urushiol and exacerbate symptoms.
Cold Compress:
Apply a cold compress to the exposed skin to alleviate itching and swelling.
Antihistamines:
Use antihistamines to relieve allergy symptoms such as itching and redness.
Medical Attention:
If symptoms are severe or do not improve with home remedies, seek medical care. Make sure to inform healthcare providers about the exposure to urushi lacquer.

OVERVIEW

Being exposed to urushi lacquer can result in a range of health effects, emphasizing the importance of wearing protective clothing and following safety measures to prevent exposure. If you suspect exposure or encounter symptoms, it's essential to consult a doctor for appropriate guidance and treatment.
It's crucial to acknowledge that exposure to urushi lacquer can manifest in various symptoms and health effects, with diagnosis typically relying on clinical evaluation and the identification of exposure history.
Patients may require referral to a specialized allergist or dermatologist with expertise in similar cases.
Our company does not accept liability for any mishandling or improper use of this product.