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tanaka sawmill by Yoshitora

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What's "kosyokunobi"

-Wood-protective natural products based on traditional technique
realizing the beauty of antique colors-

This is a story of an age-old product ensuring a taste for elegance.
From time immemorial, human beings have learned a large variety of things from home. Families have been wishing for prosperous, safe and comfortable living and dwellings day by day. There can be seen dignified black, dark brown and well-matched color tone to the climate of nature, which pillars and beams have created with the current of the times.
Building materials with the feeling of subtle taste and elegant simplicity, like old wood used for a tea-ceremony house or new wood given an antique look. Everyone cannot but feel a time-honored and alluring ambience.

"BENIGARA" (red oxide)


Red oxide has been applied for wood protection and as a color pigment around the world since a long time ago. It is said to originate from Bengal, India, being also called Indian red. In Japan it might be first used around ten thousand years ago. Japanese myth tells the situation of the times. Since then, the application of red oxide, brushed up by the culture and technique of Japanese own, has long contributed to the protection of wooden architecture in harmony with the natural environment.
"BENIGARA"(red oxide) from Nakatome, which took over the traditional technique of dispersing, used for local homes, is nowadays still working out and way on the protection and coloration of wood for housing, preserving the balance between people and the environment.
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"BENIGARA"(red oxide) from Nakatome is "the natural coloring steeped in tradition" which has carried down the technique of dispersing red oxide together with colza oil, rosin, and lampblack to the present , surviving through over 300 years' history.


Please note that the color or gloss of these color samples is sometimes different from the real one according to the circumstances of PCs you use or the type of wood.
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Wood coloring with natural pigment and food oil waste
Household oil waste has been collected in some areas, but most may have been incinerated as household flammable garbage, or much more worse, poured away like wastewater. According to the White Paper on the Environment 1998, household oil waste adds up to two hundred thousand tons, and recently only a little oil waste has been reproduced.
Most of the oils and fats contained in oil waste are mainly semidrying oils such as soybean oil, colza oil, sunflower oil, etc. We tried to treat them with industrial process of mixed method. Local governments, however, regulate the collection and carrying out of household oil waste to other prefectures or cities in business. So our conclusion is that it is better for users to take advantage of their own household oil waste.
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Overcoat formation method with semidrying oil
Dryers and other additives are never used to speed up drying. Take milk for instance. Milk holds the state of emulsion that water and oil, lacto protein, and calcium are dispersed and mixed in water. Milk forms a film when water evaporates. This method is basically the application of the principle. By mixing milk casein powder into semidrying oil, a thin film is formed on the surface of the semidrying oil without reducing its permeability and elasticity to wood, preventing the surface of the oil from reverting to viscous liquid. This clear and simple method will be sure to attain the safe and easy way of traditional and eco-friendly painting.