The impetus for developing dünn was ``CARDRIDGE,'' a business card holder made of paper.
The cartridge, which is used as a secondary business card holder and can be placed inside a notebook or wallet, has gained support from many customers because it can solve those ``happening'' moments when you forget your business card. However, due to its ease of use, we began to receive requests from people who wanted to use it as their main item or to make it into a money clip, and we were asked to make it out of leather! So, is it possible to make such thin leather products? The card ridge is a high-end model PRO and is approximately 2mm thick. At the end of October 2014, the month Carridge was announced to the press, we began looking for a partner to carry out this process.