Solid Powder Cosmetic Masking Skin Dullness
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Solution Overview
Problem
Current make-up cosmetic compositions fail to effectively mask skin dullness, especially in the evening when uneven coverage occurs due to sebum secretion, leading to noticeable 'luster' and inadequate brightness masking.
Innovation Solution
A solid powder cosmetic composition incorporating a composite pearlescent pigment with high reflectance, spherical powder particles, and high-viscosity oil, which masks skin dullness by reducing excessive shining and ensuring uniform application while preventing caking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If interference pearlescent pigment is incorporated to mask skin dullness, then brightness masking is improved, but excessive luster becomes noticeable
Solution Approach 1:
The patent applies local quality by using interference pearlescent pigment specifically in areas where skin dullness needs masking, while controlling its concentration (0.1-5 mass%) to prevent excessive luster in areas where natural skin texture should remain visible. This localized application allows brightness enhancement where needed without creating unwanted shine elsewhere.
Solution Approach 2:
The patent changes the parameter of pigment concentration to resolve the contradiction. By precisely controlling the interference pearlescent pigment content within 0.1-5 mass%, the formulation achieves sufficient brightness masking while suppressing excessive luster. The parameter optimization allows the same pigment to provide different effects at different concentrations.
2Reliability
If foundation is applied to mask skin dullness, then initial coverage is improved, but uneven coverage occurs after lapse of time due to sebum secretion
Solution Approach 1:
The patent applies preliminary action by incorporating oil-absorbing powders (such as silica or talc) into the foundation formulation before application. These powders are pre-positioned to absorb sebum as it begins to secret, preventing the sebum from causing foundation to migrate or become uneven. This proactive approach maintains coverage uniformity throughout the day.
Solution Approach 2:
The patent ensures continuity of useful action by including ingredients that continuously absorb sebum and maintain foundation integrity over time. The oil-absorbing powders work continuously from morning to evening, providing ongoing protection against sebum-induced unevenness and extending the effective duration of uniform coverage.
3Ease of operation
If spherical powder particles and high-viscosity oil are incorporated in large amounts, then caking is prevented and uniform application is achieved, but product complexity increases
Solution Approach 1:
The patent optimizes the parameters of particle size distribution and oil viscosity to achieve uniform application with moderate ingredient amounts. By controlling spherical powder particle sizes within specific ranges and selecting high-viscosity oils with appropriate viscosity values, the formulation achieves smooth application without requiring excessive quantities of ingredients, thus limiting complexity increase.
Solution Approach 2:
The patent uses composite materials by combining spherical powder particles with high-viscosity oil in a synergistic formulation. This composite approach allows the ingredients to work together to provide uniform application and prevent caking, achieving multiple benefits with a coordinated ingredient system rather than requiring large amounts of individual components.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The composition effectively masks skin dullness emerging over time, providing a uniform and long-lasting solution that maintains a suitable level of brightness and prevents cohesion, making it suitable for everyday use.
Implementation Method 1
an interference pearlescent pigment having a reflectance of 30% or higher to visible light having a wavelength of 540 to 580 nm
Implementation Method 2
an oil having a viscosity of 500 to 100,000 cps, as measured by means of a B-type viscometer at 30°C
Data Source
Figure 1-1
Figure 1-2
AI summary
A foundation and the like which contains latent means for masking skin dullness at the time of application thereof to the skin, the means gradually working a few hours after application, is provided by providing a solid powder cosmetic composition comprising the following ingredients (1) to (3): (1) an interference pearlescent pigment having a reflectance of 30% or higher to visible light having a wavelength of 540 to 580 nm, which has been combined with one or more materials selected from among polymethylmethacrylate, silicon dioxide, platy barium sulfate, zinc oxide, and aluminum chloride, in an amount of 1 to 8 mass%; (2) spherical powder particles in an amount of 8 to 30 mass%; and (3) an oil having a viscosity of 500 to 100,000 cps, as measured by means of a B-type viscometer at 30°C, in an amount of 1.5 to 5 mass%; the amounts being on the basis of the total amount of the composition.