Eco Project, R&D : HOWA Corporation

Eco Project


Building Environment Friendly Eco Plants.

Conventional dyeing methods consumed and discharged high volumes of water, which placed huge burden on the environment. That’s where HOWA invented washing techniques that minimizes the liquid discharge and build environment friendly eco plants.

R&D of Anhydrous Dyeing using Supercritical Technology

Supercritical CO2 Equipment

The dying method of not putting out drain when the cellulosic fiber such as cotton and rayon are dyed was developed and announced in cooperation with Okayama Prefecture Industrial Technology Centre and four other institutions in January 2001. HOWA continues to invest in R&D of dyeing processes with the aim of their commercialization.

Laser Processing

Laser Processing

It is a processing method of doing various processings to the fiber cloth by the laser light beam. Water is not consumed and not discharged at all. This processing is remarkable as only HOWA can offer it in Japan. (Patent Number 2983179).

Inkjet Processing

Inkjet Processing

Since the pigment are applied on the cloth with inkjet machine and fastened with heat-treatment after processing, there is absolutely no consumption or discharge of water.

Air Wash (Ozone Decolorization)

Ozone Decolorization Equipment Products of the Air Wash processing A conception diagram of the Air Wash processing

Ozone is generated from air and its strong oxidation action decomposes and decolors the dyestuff of jeans. After that, the ozone is decomposed into oxygen, because of which harmful decolorants are not discharged at all. (Patent Number 2010650)

Eco Bleaching (Glucose Decolorization)

A conception diagram of the Eco Bleaching processing

High levels of safety and substantial reduction in environmental burden is expected with bleaching with glucose without using chemicals such as chlorine bleach. (Patent Number 3232010)

New Plant Dyeing

Products of the New Plant Dyeing

Although plant dyeing has been preferred since past as it does not use chemical dyes, they do not adhere easily to fabric, because of which there were challenges of fading and deep coloration. However, with HOWA’s dyeing method, dyeing can be done in one cycle and color does not fade easily after dyeing. (This development initiative was supported by Okayama Prefecture Industrial Technology Center. Publication Number 2005-200777)