Consistency issues in hair spectral reflectance and colour measurements

Liberini, Simone; Avolio, Antonio; Yankowski, Stevn Thomas; Rizzi, Alessandro

doi:10.1111/cote.12455

Cited by 6 publications

(4 citation statements)

References 9 publications

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“…Because human hair are scatterers, light shone on them is very likely to be reflected in unpredictable ways, more so for blondes. 18 This is unsuitable for all instruments that rely on light bouncing off surfaces for colourimetric determinations. But what matters the most is that we deem Munsell colour-order system to be extremely well suited to make relationships between colours stand out, as opposed to colours in and of themselves.…”

Section: Hair Colouring: Ostwald or Munsell?mentioning

confidence: 99%

“…Finally, we propose Munsell colour‐ordering system, and the Munsell Book of Colour for all practical intents and purposes, as a tool for measuring hair colour appearance in light of the medium's unsuitability with respect to spectrophotometric measurements. Because human hair are scatterers, light shone on them is very likely to be reflected in unpredictable ways, more so for blondes 18 . This is unsuitable for all instruments that rely on light bouncing off surfaces for colourimetric determinations.…”

Section: Hair Colouring: Ostwald or Munsell?mentioning

confidence: 99%

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Munsell and Ostwald colour spaces: A comparison in the field of hair colouring

Liberini

Rizzi

2022

Color Research & Application

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Colour science has had a very long history, dotted over the millennia with many contributions from the most diverse fields of human knowledge. At the beginning of the 20th century, Albert Henry Munsell, an artist formally trained in academia, and Friedrich Wilhelm Ostwald, Nobel prize for chemistry in 1909 and amateur painter, each envisioned and developed a colour system with a related colour atlas. Both authors recognized the importance of the visual relationship between colours, which they conceived as sensations stemming from, but not merely confined to, pigments and light. We hereby describe the salient features of these colour spaces, their strengths and weaknesses, the authors' analogy of intents and divergence in execution. The contribution of this paper is a discussion on how these are employed both in Italian educational facilities, and salon practice, as well as a suggestion about their use within the industry of human hair cosmetics.

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Section: Hair Colouring: Ostwald or Munsell?mentioning

confidence: 99%

Section: Hair Colouring: Ostwald or Munsell?mentioning

confidence: 99%

Munsell and Ostwald colour spaces: A comparison in the field of hair colouring

Liberini

Rizzi

2022

Color Research & Application

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“…No such work has yet been published in connection with oxidative coupling products. Even precise quantification of hair coloration, despite the progress made in spectrophotometer technology, remains problematic 188 …”

Section: Alternative Technologiesmentioning

confidence: 99%

A review of developments in industrial hair colorant actives for oxidative dyes

Towns

2021

Coloration Technology

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This paper reviews developments in industrial colorants as active ingredients of commercial products that rely on oxidative chemistry for the coloration of human hair. After outlining the regulatory challenges faced by the industry, which are shaping the landscape of colorant usage, the most commercially important actives utilised in oxidative hair colorant formulations are surveyed from the perspective of their chemistry and economics. Some developments in the form of recently introduced actives are also described.

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“…The same fidelity human eye assessment can be reported also in other practical applications, eg, to define the colours of objects illuminated through LEDs, 29 to assess the colour variations after a restoration treatment, 30 to identify the conservation state of ancient buildings 31 and hair colour assessment. 32…”

Section: Representationmentioning

confidence: 99%

The limits of colorimetry in cultural heritage applications

Plutino

Simone

2020

Coloration Technology

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Colours in cultural heritage are not only means of expression, but also materials with physical and chemical properties. Since the beginning of the current century, colorimetry has become a fundamental field aiming at restoring, preserving and valorising the art works. There are different colorimetric applications in cultural heritage (eg, from light design to digitisation and modelling), and the variety of cultural material is extremely wide, from statues and frescoes, to old book and films. In this heterogeneous context, the development of instruments, measurements and tools faithful to the original objects are fundamental to correctly reproducing and representing materials, contrast and colours of the works under analysis. In this work, we will analyse the main limits of colorimetry applied in cultural heritage domain considering a variety of applications on physical colour representation and on digital colour reproduction. We will focus on main state‐of‐the‐art studies, regulations and guidelines for objects illumination, colour analysis and digitisation workflow showing some practical example of issues encountered by standard pointwise colorimetry.

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Consistency issues in hair spectral reflectance and colour measurements

Cited by 6 publications

References 9 publications

Munsell and Ostwald colour spaces: A comparison in the field of hair colouring

Munsell and Ostwald colour spaces: A comparison in the field of hair colouring

A review of developments in industrial hair colorant actives for oxidative dyes

The limits of colorimetry in cultural heritage applications

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