Abou me• 元村 愛美 ( Ami Motomura )• お茶の⽔⼥⼦⼤学⼤学院 五⼗嵐研究室 M1First-year masterʻs student at Igarashi Laboratory,
Ochanomizu University, in Tokyo• 今回はInteractivityで発表
a participant of Interactivity part of CHI2023• 今回が⼈⽣初の国際会議参加
CHI2023 was my first experience of an international conference.
Mail: ami.moto.ocha@gmail.com

Twitter: @9_10_10_

About my researchDemonstrating FoodSkin: A Method for
Creating Electronic Circuits on Food Surfaces
by Using Edible Gold Leaf for Enhancement of
Eating Experience
Kunihito Kato 1
Hiromi Nakamura 4

Ami Motomura 2
Yuki Igarashi 21 Tokyo University of Technology

Kaori Ikematsu 3

2 Ochanomizu University

3 Yahoo Japan Corporation

4 The University of Tokyo

Introduction

DuoSkin[ISWC 2016]

Rapid Prototyping of Paper Electronics
Using a Metal Leaf and Laser Printer[UIST 2019]

EdiSensor[LifeTech 2021]

Aesthetics and conductivity of gold leaf have led to it being applied to the surface ofvarious objects to create electronic circuits

Introduction

DuoSkin[ISWC 2016]

Rapid Prototyping of Paper Electronics
Using a Metal Leaf and Laser Printer[UIST 2019]

EdiSensor[LifeTech 2021]

Aesthetics and conductivity of Gold leaf have led to it being applied to the surface ofvarious objects to create electronic circuits

However••

No method has been established to form arbitrarily shaped patterns using only edible materials.
It is difficult to create complex circuit patterns with edible materials as with inedible materials.

Introduction
Previous method
Dry foods are not conductive.

It is difficult to include as a part of an electroniccircuits.

Introduction
Attaching an edible gold leaf on food surface

FoodSkin

Enabling the integration of dry foods
into electronic circuits

Gold-leaf pattern

Expanding the design space of the computeraugmented dining experience.

Fabrication Process••

FoodSkin consists of these five steps.
Fabrication is easy due to the use of readily available materials.
(gold leaf sheets, water, edible paper, and potato starch)

Fabrication Process

moisten edible paper slightly using mist blower

Fabrication Process

place the gold leaf on the moistened surface of the paper

Fabrication Process

after drying, cut the shape into the desired pattern

Fabrication Process

apply a thin adhesive to the food surface

Fabrication Process

place the gold-leaf pattern

Applications
We introduce three applications of FoodSkin that enhance the eating experience.

Controlling Food Tate

Controlling Food Temperature

Providing Auditory FeedbackControlling Food Taste through Electrical Stimulus

This application is controlling the taste of a food by applying an electrical stimulus to the mouth throughan electrode made of edible gold leaf attached to the food surface.

Controlling Food TemperatureThis makes it possible to keep food warm until immediately before ingestion and to change thetemperature dynamically during ingestion

Providing Auditory Feedback when Eating Sweets

This application is creation an interactive sweets that emit a sound form an external speaker when consumed.

Conclusion & Future work

• We have presented a method for creating circuits on food surfaces by using edible
gold leaf and its potential applications.
• Our method enables the incorporation of dry food into an electronic circuit, which isdifficult with previously proposed methods.
• FoodSkin will expand the design space of computer-augmented dining experiences.
• Future work is applying FoodSkin to a wider range of applications.

Demonstrating FoodSkin: A Method for
Creating Electronic Circuits on Food Surfaces
by Using Edible Gold Leaf for Enhancement of
Eating Experience
Kunihito Kato 1
Hiromi Nakamura 4

Ami Motomura 2
Yuki Igarashi 2

1 Tokyo University of Technology

Kaori Ikematsu 3

2 Ochanomizu University

3 Yahoo Japan Corporation

4 The University of Tokyoここからは⽇本語でInteractivityについて• ⼀⾔で⾔うと、デモ発表部⾨
• HCI、ゲーム、エンターテイメント、デジタルアート、インタラクティブアート、デザイン等々、様々な分野の発表を実体験できる• 今回は完全対⾯• 2023年の採択件数/応募件数は52/133件(39%)• ⽇本⼈が関わっている発表もそこそこ多かったように感じた（完全なる主観）• 参加したことのある国内学会と⽐較すると、WISSのデモ発表をもっと賑やかにした雰囲気に感じたInteractivityについて

Interactivityについて• 審査員賞や⼀般投票賞もある

Juryʼs Best Demo Recognition Winner: MOFAPeopleʼs Best Choice for Best Demo Winner:
Design and Fabrication of Body-Based Interfaces

発表を振り返って

発表内容• アプリケーション3つの展⽰（⾷品の実⾷はしない）• 電気味覚ー電気が通ってる様⼦をオシロス
コープで⾒せる• 温度変化ー温度変化の様⼦を実演• 聴覚フィードバックーデバイスを使⽤する様⼦を再現• 回路作成の体験コーナー• ⾦箔をカットしてクッキーの表⾯に接着する⼯程を体験できる• クッキーはお持ち帰りできる• 4⼈で担当分担して説明発表を振り返って感想• 1番の感想「楽しかった！」• リアクションが豊かで国内学会でのデモ発表よりも発表しやすかった• 時間もあっという間に過ぎた• 「これ⾷べていいの！？」とすごく聞かれた^^;

CHI2023参加を通して参加前の正直な⼼情• 初めての国際会議• 海外渡航も10年ぶり⼈⽣2回⽬！
• 会議の雰囲気について軽く調べたがあまりわからないまま参戦• 英語もあまり得意ではない…
• 参加者に知り合いの学⽣もほとんどいない…

→不安だ…、何もかも…(^^;

CHI2023参加を通して参加後の⼼情• なんといってもまずは「楽しかった！」• 思っていたよりもかなり和気藹々と していた
• 英語による発表もなんとかなった• が、聞き取りは上⼿くいかず、他の発表の聴講時には⼒不⾜を痛感する場⾯も多々…
• 国際発表への印象が⼤きく変化（というか参加前はかなり恐れていた）•修⼠に⼊って⼼機⼀転というこのタイミングで参加できて良かった• 研究がより好きに、今後のモチベーションに• ハワイ⾏きたい！頑張ります！

Thank you for listening!