Introduction to Mobile Transparent Glass Toilets

Mobile transparent glass toilets are public toilets that primarily use fully transparent or one-way transparent glass as walls or partitions, with diverse design concepts, technical implementations, and practical applications.

Design Intentions

Designers from different countries have proposed varying design concepts. Finnish designers have proposed fully transparent designs, with the core aim of leveraging people's sense of shame to encourage users to consciously maintain toilet hygiene. Japanese designer Shigeru Ban, starting from public needs, uses transparent designs to allow external individuals to directly confirm the cleanliness inside the toilet and whether it is in use, alleviating concerns about public toilet hygiene and safety hazards. Additionally, some designs (such as the case in Leshan, Sichuan) use one-way transparent glass, which not only protects user privacy but also allows them to observe external situations (such as queue lengths or childcare).

Technical Implementation

Technically, functionality is mainly achieved through two types of glass:

1. Smart dimming glass: Utilizing electrochromic dimming technology (such as liquid crystal dimming film PDLC), it controls glass transparency through electrical current. When unoccupied, it remains transparent with power on; when someone locks the door, it automatically fogs up, balancing privacy protection with cleanliness display. The transparent public toilet in Shibuya, Tokyo, Japan, employs this technology.
2. One-way mirror glass: Leveraging optical principles, it only allows internal individuals to observe the outside, while the outside cannot see inside. The public toilet in the World Jasmine Expo Park in Leshan City, Sichuan, uses this type of glass.
   It should be noted that some cases have experienced 'unintended transparency' due to material or construction defects, sparking privacy controversies.

Typical Cases

1. The 'Toilet in Nature' in Ichihara City, Chiba Prefecture, Japan, designed by Sou Fujimoto, is constructed with fully transparent glass, covering an area of 200 square meters, and is known as the 'world's largest toilet'.
2. The transparent public toilet in Shibuya, Tokyo, Japan, designed by Shigeru Ban, uses colored smart glass technology, remaining transparent when unoccupied and becoming opaque when locked, combining aesthetics with practicality.

Controversies and Improvements

In practical applications, improper privacy handling is a major point of contention. In various places in China (such as Taiyuan, Shanxi, and Jianyang, Sichuan), transparent public toilets have faced public dissatisfaction due to insufficient privacy protection, leading to subsequent rectifications through posting privacy films, adjusting opening hours, or replacing construction materials. These cases indicate that the design of transparent public toilets needs to balance innovation with practicality, avoiding damage to user rights due to technical defects or management oversights.