An anodized titanium (titanium dioxide, TiO2) layer on a titanium (Ti) plate makes various colors. A driving force of the coloration is considered to be the thin film interference between the TiO2 layer on the Ti plate. The focus of the present work is to explore the possibility that a toner mask method could be used for preparing a digital image on the Ti plate by an anodization. And we tried to erase the image on the Ti plate. We found that 1% hydrofluoric acid solution was able to erase the image in a few minutes, but a ghost image appeared. We also explored how to prevent the ghost image appearance.
Digital scanned image in duplex printing is often degraded by the show-through effect. This paper proposes the robust show-through cancellation method using the Kalman filter algorithm with the colored driving source. The linear mixture show-through image model of the proposed method is composed of the front and back sides image. The remarkable feature of the proposed method removes the show-through effect without sacrificing quality of the front-side image. Experimental results with real show-through images demonstrate the good performance visually of the proposed method.
Watermark pattern, which is typified by Japanese paper, can reflect various patterns in gradation sometimes brightly and sometimes darkly unlike electronic watermark. Watermark paper is used for various interior items, gift wrapping paper and security paper. Fiber material used for watermark paper is also used for printing as banknote and passport, and contributes to prevention of forgery. In this article, we focused on the change of diffuse transmitted light to the angle of inclination, by irradiating light on watermark paper from different angles. We examined the new direction for image recognition from diffuse transmitted light, by receiving diffuse transmitted light through rod lens with narrow viewing angle. As a result, we revealed that image recognition of deeper gradation pattern can be gained compared to contact image sensor with reflected light source which reads the image printed on coated paper. We also confirmed that by knowing the light quantity of diffuse transmitted light that emits from black watermark part and white watermark part in watermark paper with pattern formed inside, we can achieve the optimization of irradiation angle and the downsizing of contact image sensor with transmitted light source. In other words, practical use of highly original thin type reading device can be achieved, which does not need the prevention of instantaneous malfunction of peripheral circuits by incidence of excessive direct transmitted light to receiving section, prevention of secondary radiation of primary incident light that re-enters light source, nor equipment of optical attenuation filter.
Reduction of the standby power has been demanded for many years. In the printers and the multifunction printers of Brother Industries, Ltd., we continued reducing standby power by reducing the electrical load and putting up the power supply efficiency. However, standby power comes to have difficult that we reduce it by the conventional technology.
Therefore we developed the low standby power technology that was greatly different from before in a concept. It is a system controlling a stop and the restart of the switching power supply which supplies electricity to an apparatus and turns off a power supply with the standby mode. In this way, the printers and the multifunction printers of Brother Industries, Ltd. realizes superior low standby power.
Since the end of the 20th century, 3R (REUSE REDUCE RECYCLE) has been recommended for packing components, and manufacturers have designed various ecofriendly packing components. In addition, manufacturers have been required more and more effort to prevent global warming recently.
Our company has been struggling to protect environment actively by using paper cushioning like corrugated cardboard.
Then we introduce the example of using paper cushioning which was carried out in our company, and we explain about possibility and eco-friendliness of the paper cushioning which will be common.
A new process for treatment of industrial wastewater under high temperature and pressure has been developed. The process can decompose industrial wastewater at 400-500°C and 9-10MPa in 30-60 seconds in the presence of a catalyst. In this report, we describe the treatment results of industrial wastewater using a catalyst in the experimental equipment.
In addition, equalization of the combustion temperature is necessary in applying this process into large scale pilot plant reactor. Therefore, in order to atomize industrial wastewater, two-fluid nozzle has been developed. The temperature distribution during the oxidation without two-fluid nozzle is heterogeneous. By employing the two-fluid nozzle, the temperature distribution in the pilot plant reactor stays constant around 500°C and decomposition rate increases to 99.9%.
In recent years, in order to increase the attention of the living environment, development of the new technology for reducing volatile organic compounds (VOCs), PM2.5, odor, bacteria, and virus is progressing. Especially, the photocatalyst expected as environment purification material, because it can decompose organic matter with light as an energy source.
Toshiba Materials Co., Ltd., and Toshiba Corporation developed high performance visible light response tungsten oxide (WO3) photocatalyst with using technique of tungsten processing. By constructing this WO3 photocatalyst on the wall of the living space, public space, or office, it is possible to purify the air. This report introduces about the development of the photocatalyst, high performance due to the metal oxide additives, and application examples of the real space.
We have conducted research and development on encapsulated Shewanella bacteria with Morishita Jintan Co., Ltd. The Shewanella bacteria are able to separate and concentrate rare metals from dilute solutions into microbial cells. We have developed a new biomineralization system to reduce soluble palladium (II), platinum (IV), and gold (III) into insoluble metal nanoparticles. We also proposed a new biosorption system to separate soluble indium (III) or dysprosium (III) and concentrate it within microbial cells. Moreover, microbe-enclosed capsules were used as a simple method of introducing the Shewanella bacteria into the process solution during rare metal recovery. The use of encapsulated Shewanella bacteria is an effective way to facilitate efficient solid-liquid separation of bacterial cells containing rare metals. Our proposed recycling biotechnologies are linked to the development of low-cost and eco-friendly recycling processes that enable the low-energy and rapid recovery of rare metals from post-consumer products.