Fluoride-Enhanced Depilatory Substrate for Efficacy and Safety
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Solution Overview
Problem
Substrate-based depilatory compositions typically provide a lower dosage of active ingredients, reducing their efficacy compared to creams or lotions, and can be messy and awkward to use.
Innovation Solution
An aqueous depilatory composition with a source of fluoride ions is applied to a substrate, forming a coated area that enhances hair removal efficacy by increasing the dissociation of thioglycolate salts, while being water-impermeable to prevent drying and skin irritation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If substrate-based depilatory composition is used, then ease of operation is improved, but depilatory efficacy deteriorates due to lower dosage of active ingredients
Solution Approach 1:
The patent introduces a fluoride ion source into the aqueous depilatory composition, which fundamentally changes the chemical parameters of the system. The fluoride ions catalyze the dissociation of thioglycolate salts, dramatically increasing the concentration of active depilatory species available on the substrate. This parameter change enables the substrate-based product to achieve high depilatory efficacy despite the inherent limitation of lower active ingredient dosage compared to creams or lotions.
2Ease of operation
If aqueous depilatory composition is applied to substrate, then ease of operation is improved, but reliability deteriorates due to potential drying and skin irritation
Solution Approach 1:
The patent employs a composite substrate structure comprising a water-impermeable layer that acts as a barrier between the aqueous depilatory composition and the skin. This composite material approach allows the beneficial aqueous formulation to be delivered while preventing the harmful effects of excessive drying and irritation. The water-impermeable layer modulates the release and contact of the composition with skin, ensuring reliable and safe performance.
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 achieves improved hair removal efficacy with reduced skin irritation and a more convenient application process, maintaining effective depilatory action and safety.
Implementation Method 1
the composition comprises a source of fluoride ions... enhancing efficacy... increasing the dissociation of thioglycolate salts
Implementation Method 2
water-impermeable to prevent drying and skin irritation
Data Source
AI summary
An aqueous depilatory composition comprising a thioglycolate salt and a fluoride ion source.