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Appreciation towards nendo for providing the following description:

这是一款将刀片隐藏在“壳”内的裁纸刀。

A paper knife with the blade hidden inside the “shell.”

▼裁纸刀外观造型，General view © Akihiro Yoshida

当信封被卡在裁纸刀侧面的缝隙时，附着在螺旋体内侧的刀片将恰好切入信封并将其打开。为了实现由外壳变形为刀片的复杂形态，设计使用了3D打印技术；同时由于刀片的锋利程度有限，在刀片的正确形状、角度和与狭缝的距离方面均进行了反复的实验和测试。

▼草图，Sketch © nendo

When an envelope is passed through the slit on the side, a blade attached to the inner spiral enters under the flap, and opens the envelope. A 3D printer was used to achieve the complex shape of the exterior morphing into the blade, but because of the limited sharpness of the blade, repeated experiments were performed for the cutter’s right shape, angle, and distance from the slit.

▼裁切示意，Way of cutting © Akihiro Yoshida

▼外观细节，Detailed view © Akihiro Yoshida

裁纸刀的名称“Nautilus”来源于外观与鹦鹉螺或菊石的螺旋状贝壳。

The name of the paper knife “Nautilus” comes from the appearance like a spiral seashell of nautilus or ammonite.

▼黑色款，The black version © Akihiro Yoshida

Client: ichido°
Collaborator: Masahiro Ohgami
Photographer: Akihiro Yoshida

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