Transparent Depilatory Article for Accurate Skin Application

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Solution Overview

Problem

Existing substrate-based depilatory compositions lack accurate positioning and risk skin irritation due to uncontrolled application, as users cannot visually assess the application process, leading to incomplete or excessive exposure.

Innovation Solution

A transparent and non-reflective depilatory article with a transparent substrate and composition, allowing users to see the skin and hair during application, along with indicia for guidance, enabling accurate placement and monitoring of the depilation process.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a substrate-based depilatory composition is used, then the need for an application implement is reduced, but accurate positioning of the depilatory article becomes difficult

Engineering Contradiction:
Improveapplication processVSAvoidpositioning accuracy
Core Design Contradiction:
Ease of operationVSManufacturing precision

Solution Approach 1:

The patent applies transparency as a visual indicator to enable users to see the skin and hair through the substrate, allowing accurate positioning and monitoring of the depilation process. The transparent substrate and composition allow visual feedback during application, resolving the positioning accuracy issue while maintaining ease of operation.

Inventive Principle:
Principle #32Color changes

2Ease of operation

If the depilatory composition is disposed on a substrate, then handling problems of creams and lotions are addressed, but visual assessment of application and progress becomes impossible

Engineering Contradiction:
ImprovehandlingVSAvoidvisual feedback
Core Design Contradiction:
Ease of operationVSLoss of information

Solution Approach 1:

The patent makes both the substrate and depilatory composition transparent, enabling users to visually assess the application process and monitor hair removal progress through the article. This maintains the handling advantages of substrate-based products while restoring visual feedback capability.

Inventive Principle:
Principle #32Color changes

3Productivity

If the depilatory article is placed without visual guidance, then application speed is maintained, but skin irritation and ineffective depilation occur

Engineering Contradiction:
Improveapplication speedVSAvoidskin irritation
Core Design Contradiction:
ProductivityVSObject-affected harmful factors

Solution Approach 1:

The transparent design provides real-time visual feedback to users during application, allowing them to see where the composition is applied and monitor the depilation process. This enables accurate positioning and appropriate exposure time control, preventing both skin irritation from excessive application and ineffective depilation from insufficient coverage.

Inventive Principle:
Principle #23Feedback

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

Improves user accuracy in applying the depilatory article, reduces skin irritation, and enhances hair removal efficacy by allowing visual assessment of progress without relying on timing.

Implementation Method 1

A transparent and non-reflective depilatory article with a transparent substrate and composition, allowing users to see the skin and hair during application

Methodology Applied
Scientific EffectLight transmission: Light

Implementation Method 2

Such compositions may comprise thioglycolate salts to degrade keratin in the hair and thus weaken the hair strands

Methodology Applied
Scientific EffectChemical degradation: Chemical Bonding

Data Source

PatentEP2407143B1Transparent depilatory article
Publication Date: 2013.01.23 PROCTER & GAMBLE CO
  • EP2407143B1 patent drawingFigure 1~2
  • EP2407143B1 patent drawingFigure 3
  • EP2407143B1 patent drawingFigure 4

AI summary

A depilatory article comprising a substrate and a depilatory composition comprising a keratin reducing agent and being in physical contact with the substrate, preferably forming a coated or impregnated region of the substrate wherein at least a portion of the substrate is transparent