Physical origin of a complicated tactile sensation: ‘
 shittori
 feel'

Kikegawa, Kana; Kuhara, Rieko; Kwon, Jinhwan; Sakamoto, Maki; Tsuchiya, Reiichiro; Nagatani, Noboru; Nonomura, Yoshiaki

doi:10.1098/rsos.190039

Cited by 30 publications

(19 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The friction force was evaluated using a sinusoidal motion friction evaluation system, in which the contact probe slide on objects under sinusoidal motion, at 25 0.5 and 50 5 relative humidity 9,11,12 . Figure 2 shows a photograph and overview of the device.…”

Section: Physical Evaluationsmentioning

confidence: 99%

“…The finger model mimics the mechanical properties of a finger and the morphology of a fingerprint. Using this evaluation system, Kikegawa et al have proposed the physical origin of the Shittori feel, a tactile sensation of moderate moisture 11 . Tsuchiya et al have found that Shit-tori is a complex combination of moist and smooth feels induced by a frictional phenomenon on the skin, i.e., when the finger starts to move and when the finger rubs a powder, respectively 12 .…”

mentioning

confidence: 99%

See 1 more Smart Citation

Recognition Mechanism of the “Sara-sara Feel” of Cosmetic Powders

et al. 2021

Self Cite

View full text Add to dashboard Cite

IntroductionSara-sara is a Japanese onomatopoeia originally meant to represent the sound that occurs when light objects touch each other or when water flows shallowly 1 . However, a new meaning, i.e., a state in which things are not damp or sticky and feel dry, has been added to this definition. At present, the Sara-sara feel is a preferred tactile sensation when people touch human skin, hair, clothing, and cosmetics.Sara-sara is important when touching powder, because the sensation is related to the tactile and lubrication properties of cosmetics and other daily products. Yamamoto et al. have found that this sensation occurs when touching powder with a grain size greater than f10 µm 2 . Oheda et al. have reported that Sara-sara is a comforting tactile feel for powder cosmetics 3 , and Sambe et al. have shown that this sensation is desired for antiperspirant powder, which refreshes sweaty or greasy skin 4 .Although Sara-sara is a common and important sensation in several industrial fields, there are few reports on its physical origin. Kamikawa et al. have evaluated the tactile texture of cosmetic powders and oils and found that both

show abstract

Section: Physical Evaluationsmentioning

confidence: 99%

mentioning

confidence: 99%

Recognition Mechanism of the “Sara-sara Feel” of Cosmetic Powders

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…Also, some studies reported that the moistness or stickiness perception was mainly attributed to friction force or friction coefficients [21‐23]. In the case of touching powder‐covered surfaces, Kikegawa et al [24] reported that the moistness feeling (‘ shittori ’ in Japanese) was a complex sense derived from several physical parameters, moistness and smoothness, and the difference between static and kinetic friction coefficients and friction vibrations. Suehiro et al [25] showed that Japanese people experienced the feeling of moistness by small vibrations in friction coefficient temporal changes when touching fabrics.…”

Section: Discussionmentioning

confidence: 99%

Sensory words may facilitate certain haptic exploratory procedures in facial cosmetics

Arakawa

Watanabe

Fukushima

et al. 2020

Intern J of Cosmetic Sci

View full text Add to dashboard Cite

ObjectiveMany people want to have healthy facial skin. They tend to check their skin’s condition by touching their face with their hands. In the cosmetic industry, we need to understand what consumers are perceiving in a tactile sense when touching their own facial skin. The purpose of this study was to investigate these observation methods in order to systematically understand people’s haptic exploratory procedures (HEPs).MethodsThirty‐four participants living in the United States and twenty‐two participants living in Japan freely explored their faces and answered which side felt more closely related to the six tactile adjectives. A new analysis was applied to classify the observed HEPs into six classifications within two categories and three sizes of contact area by experts.ResultIt was confirmed that the new task was useful to observe the HEPs for participants from United States and Japan. The US participants’ HEPs for ‘moisturized’ were mainly a middle‐sized contact area using a stroking motion. On the other hand, Japanese participants’ HEPs for ‘moisturized’ (‘shittori’ in Japanese) mainly used a pushing movement. Moreover, the US participants’ HEPs for ‘soft’ included both pushing and stroking, but Japanese participants HEPs for ‘soft’ (‘yawarakai’ in Japanese) were again mainly pushing.ConclusionThis study suggests that the proposed analysis method enables the systematic understanding of HEPs when checking the skin, along with the cross‐cultural differences affecting those procedures. These systematic findings could allow cosmetic formulators to have a better understanding of the tactile sensations consumers themselves are feeling in a variety of different global markets.

show abstract

“…Previously, we revealed the tactile expression mechanism of cosmetic sponges, cosmetic powders, leathers, and cloths using this evaluation system (Asanuma, Aita, & Nonomura, 2018; Kikegawa et al, 2019; Tsuchiya, Kuhara, Kikegawa, Nagatani, & Nonomura, 2020). When the change of the friction coefficient was small, the slippery feel of sponges became strong.…”

Section: Introductionmentioning

confidence: 99%

“…The normalized delay time δ, obtained by dividing the time lag Δt by the time for a cycle T 0 , was 0.014. Previous studies suggest that δ reflects characteristic friction phenomena on soft matter surfaces(Aita et al, 2017;Asanuma et al, 2018;Kikegawa et al, 2019;Nonomura & Ouchi, 2020;Okawara et al, 2019;Shinomiya et al, 2018;Tsuchiya et al, 2020).…”

mentioning

confidence: 99%

Nonlinear friction dynamics in the cognitive process of food textures: Thickness of polysaccharide solution

Okawara

Shinomiya

Fujita

et al. 2020

Journal of Texture Studies

Self Cite

View full text Add to dashboard Cite

"Thickness" is one of the descriptors of texture in liquid and semisolid foods. In this study, friction in thickener aqueous solutions was evaluated, using a biomimetic friction evaluation system, to show the correlation between friction data and sensory thickness and the recognition mechanism of this sensation during the process of eating. This system can measure friction forces under sinusoidal movement on fractal agar gel, which mimics the morphology and physical properties of the tongue. We found that an increase in the viscosity of the thickener aqueous solution was responsible for both the sensory score of thickness and the asymmetric profile of the friction coefficient in a reciprocating motion. In the case of low viscosity liquids such as water, many of the subjects did not feel thickness, and the friction profile "stable pattern I," that is, a static friction coefficient larger than kinetic friction and a similar profile in the outward and inward processes were observed. However, in the case of solutions containing 3 or 5 wt% of food thickener, the friction profile "unstable pattern I," that is, different friction behaviors in the outward and inward processes, was observed, and many of the subjects experienced strong thickness. In addition, the static friction coefficient at the first cycle was small, and the changes of friction coefficient by the reciprocating motion being repeated was large. These friction phenomena can occur in the mouth and are expected to induce sensory thickness.

show abstract

Physical origin of a complicated tactile sensation: ‘ shittori feel'

Cited by 30 publications

References 44 publications

Recognition Mechanism of the “<i>Sara-sara</i> Feel” of Cosmetic Powders

Recognition Mechanism of the “<i>Sara-sara</i> Feel” of Cosmetic Powders

Sensory words may facilitate certain haptic exploratory procedures in facial cosmetics

Nonlinear friction dynamics in the cognitive process of food textures: Thickness of polysaccharide solution

Contact Info

Product

Resources

About