Dry Test Soil Composition for Reliable Cleaning Assessment
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Solution Overview
Problem
Existing test soils for assessing the cleaning action of cleaning devices for human egesta are complex to produce, require specific equipment, and have limited shelf life, making them impractical for on-site use.
Innovation Solution
A composition comprising nigrosin, wheat flour, and whole egg in dry form, which can be easily mixed with an aqueous solvent to create a test soil that is stable and easy to handle, allowing for standardized assessment of cleaning devices without the need for on-site production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional test soils are used for assessing cleaning devices, then the assessment can be performed, but the production is complex and requires specialized equipment
Solution Approach 1:
The patent changes the physical state parameter of the test soil from liquid/fresh mixture to dry powder form. This transformation allows the test soil to be stored without specialized equipment and simplifies production while maintaining the same functional properties for cleaning assessment when reconstituted with water.
Solution Approach 2:
The patent prepares the test soil constituents in advance in dry powder form with predetermined ratios of cleaning agents, surfactants, and pigments. This preliminary preparation eliminates the need for complex mixing equipment and specialized knowledge during actual testing, as users simply need to mix with water.
2Reliability
If traditional test soils are used, then cleaning assessment can be performed, but the shelf life is limited and storage requires refrigeration
Solution Approach 1:
The patent changes the moisture content parameter from high (liquid test soils requiring refrigeration) to low (dry powder form). This parameter change extends shelf life significantly and eliminates the need for refrigerated storage while preserving the cleaning and staining properties when the product is reconstituted.
Solution Approach 2:
The patent creates a stable, long-lasting dry powder formulation that replaces the traditional short-lived liquid test soils. The dry form can be stored indefinitely without degradation, eliminating waste and the need for frequent preparation of fresh test soils.
3Measurement precision
If traditional test soils are used, then cleaning device performance can be evaluated, but the production is time-consuming and constitutes a crucial step for testing duration
Solution Approach 1:
The patent performs all complex formulation work in advance during manufacturing of the dry powder. The precise ratios of cleaning agents, surfactants, and pigments are predetermined and uniformly distributed in the powder, eliminating time-consuming mixing operations during actual testing procedures.
Solution Approach 2:
The patent changes the form from requiring complex multi-step preparation (mixing, heating, cooling) to a simple one-step process of adding water to powder. This dramatically reduces the time investment required while maintaining measurement precision through consistent formulation.
4Difficulty of detecting and measuring
If traditional test soils are used, then visible residual staining can be detected, but the test soils are complex to produce and store
Solution Approach 1:
The patent changes the physical form from liquid to dry powder, which simplifies handling, storage, and transport. The dry powder is more stable and less prone to contamination or degradation, while the pigment components remain intact to provide visible staining for detection after cleaning cycles.
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 provides a stable, easy-to-use test soil that simplifies the production process, extends shelf life, and ensures consistent results, facilitating efficient evaluation of cleaning devices for vessels holding human egesta.
Implementation Method 1
nigrosin, (b) wheat flour and (c) whole egg... visible residual staining
Implementation Method 2
dissolving the composition as claimed of the invention in an aqueous medium
Data Source
AI summary
A composition may include, in dry form: (a) nigrosin; (b) wheat flour; and (c) whole egg. Such compositions may be used for production of test soil for assessment of the cleaning action of cleaning devices. Methods of producing a test soil for assessment of the cleaning action of cleaning devices for cleaning of vessels for human egesta, e.g., of washer-disinfectors, including dissolving the composition in an aqueous medium. A test soil may include the constituents of the composition in an aqueous medium, and such soils may be used for assessment of the cleaning action of cleaning devices. A method may assess the cleaning action of cleaning devices for cleaning of vessels for human egesta.