Composition for producing test soils for evaluating cleaning performance of cleaning equipment and method of using same

Abstract

The present invention relates to a composition comprising the following ingredients in dry form: (a) nigrosine, (b) wheat flour, and (c) whole egg. The present invention also relates to a method of using the composition of the present invention to generate a test stain for evaluating the cleaning performance of a cleaning device. A method for generating a test stain for evaluating the cleaning performance of a cleaning device for cleaning a container for human waste, particularly a washer-disinfector, is also provided, which method comprises dissolving the composition of the present invention in an aqueous medium. The present invention relates to a test stain comprising the components of the composition of the present invention in an aqueous medium, and a method of using it to evaluate the cleaning performance of a cleaning device. Finally, the present invention relates to a method for evaluating the cleaning performance of a cleaning device for cleaning a container for human waste.

Description

[Technical Field]

[0001] The present invention relates to a composition comprising, in dry form, the following ingredients: (a) nigrosine, (b) wheat flour, and (c) whole egg. The present invention also relates to a method of using the composition of the present invention to generate a test stain for evaluating the cleaning performance of a cleaning device. A method of generating a test stain for evaluating the cleaning performance of a cleaning device for cleaning a container for human waste, particularly a washer-disinfector, is also provided, comprising the step of dissolving a claimed composition of the present invention in an aqueous medium. The present invention relates to a test stain comprising the components of the composition of the present invention in an aqueous medium, and a method of using the same to evaluate the cleaning performance of a cleaning device. Finally, the present invention relates to a method of evaluating the cleaning performance of a cleaning device for cleaning a container for human waste. [Background technology]

[0002] The prior art includes numerous cleaning devices and methods for treating containers for holding human waste, such as urinals or urinals. The containers being treated typically contain relatively large amounts of liquid or solid waste that must be disposed of during cleaning. Moreover, because such containers may contain infectious waste or may be contaminated in some other way, they typically require not only emptying but also disinfection. Therefore, such cleaning devices for treating containers for human waste are often referred to as cleaning and disinfecting devices, or alternatively, as washer-disinfectors (WDs). Because urinals are often the items being cleaned, such devices are also often referred to as urinal cleaners. The requirements for such cleaning devices are essentially set forth in the ISO 15883 series of standards.

[0003] For possible examples of cleaning and disinfecting devices, reference can be made, by way of example, to DE 102004056052 A1, DE 10348344 A1, EP 1824373 B1, EP 2755695 B1, DE 102013203342 A1 or DE 102013208060 A1. The cleaning and disinfecting devices described therein can also be used as examples in the context of the present invention.

[0004] A major concern with regard to the construction and operation of cleaning and disinfecting equipment is that of ensuring the cleaning and disinfecting action. Numerous standards, specifications and recommendations exist in this regard. For example, DIN EN ISO 15883-6 describes the requirements and test methods for WDs in general.

[0005] Not only should the thermal disinfection effect be guaranteed, but sufficient freedom from soiling should be ensured in particular. For example, the Deutsche Gesellschaft fuer Krankenhaushygiene [German Society for Hospital Hygiene] recommends the use of test soils to check for visible residual soiling.

[0006] The pre-standard CEN ISO / TS 15883-5 states that valid evidence of the cleaning effectiveness of WD according to ISO Standard Series 15883 is the test stains and methods currently used in several countries, and lists the test stains for each country. For example, a mixture of bovine albumin, mucin, corn starch, and E. faecium is known for urinals and urinals in Germany. In Austria, a test stain containing potato flakes, flour, nigrosine, and egg, called the KMNE test stain, is used for urinals, and a mixture of flour, nigrosine, and egg, called the MNE test stain, is used for urinals. Additionally, specifications for the preparation and storage of the test stain are provided. This involves boiling a suspension of nigrosine and wheat flour, which are initially prepared separately. Immediately before use, a hen's egg is added and the mixture is heated. Additionally, if appropriate, dried potato flakes are added until the required consistency is reached. The test soil is then used to fill a test specimen in the form of a toilet bowl or urinal in a specified amount, and the test soil is dispersed throughout the test specimen. The WD is then fully loaded with the soiled test specimen and an appropriate wash cycle is performed. A visual test is then performed, the passing criterion being that no visible residue of the test soil should remain on the test specimen.

[0007] A real problem is the complexity of generating such test stains. The test stains may be stored in a refrigerator for up to three days, but should generally be used immediately after their generation. However, maintenance work and inspections generally have to be carried out at the location of the cleaning equipment, especially there, where the equipment required for generating the test stains is often not available. Furthermore, generating such test stains is time-consuming and often constitutes a critical step for the duration of the test. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] German Patent Application Publication No. 102004056052(A1) [Patent Document 2] German Patent Application Publication No. 10348344 (A1) [Patent Document 3] European Patent No. 1824373(B1) [Patent Document 4] European Patent No. 2755695(B1) [Patent Document 5] German Patent Application Publication No. 102013203342(A1) [Patent Document 6] German Patent Application Publication No. 102013208060(A1) Summary of the Invention [Problem to be solved by the invention]

[0009] It would therefore be desirable to provide a method for evaluating the cleaning action of a cleaning device for test soils and human waste that largely avoids the drawbacks of certain known types of test soils and methods. More particularly, the complexity involved in providing the test soils and the complexity involved in carrying out the overall method should be reduced. [Means for solving the problem]

[0010] This problem is addressed by the embodiments according to the independent claims. In the dependent claims advantageous refinements are provided which can be realized individually or in any desired combination. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 shows a visual comparison of a test soil from KMNE (Koller) (A) and a test soil according to the present invention (B). DETAILED DESCRIPTION OF THE INVENTION

[0012] In the following text, the terms "have", "comprise", or "include", or any grammatical variations thereof, are used without limitation. Such expressions can therefore refer both to a situation in which, in addition to the property introduced by such an expression, no further properties are provided, or to a situation in which one or more further properties are provided. For example, the expressions "A has B", "A comprises B", or "A includes B" can relate both to a situation in which, apart from B, A has no further elements (i.e., a situation in which A consists solely of B), and to a situation in which, in addition to B, A has one or more further elements, for example, element C, elements C and D, or even further elements.

[0013] It is further pointed out that the expressions "at least one" and "one or more," as well as grammatical variations of such expressions, when used in connection with one or more elements or properties, and intended to express that the element or property may be provided singly or in plural, are generally used only once, e.g., when the property or element is first introduced. If the property or element is mentioned again later, the corresponding expression "at least one" or "one or more" is generally no longer used, and the possibility that the property or element may be provided singly or in plural is not limited.

[0014] Furthermore, the expressions "preferably," "particularly," "for example," or similar expressions are used hereinafter in connection with optional features, without limiting alternative embodiments. Features introduced by such expressions are therefore optional, and it is not intended to limit the scope of protection of the claims, in particular the independent claims, via such features. Therefore, as those skilled in the art will recognize, the present invention can also be implemented using other configurations. Similarly, features introduced by "in one embodiment of the present invention" or "in one example of the present invention" should be understood as optional, and this is not intended to limit alternative configurations or the scope of protection of the independent claims. Furthermore, all possible combinations of features introduced herein with other features, whether they are optional or not, are intended to remain unaffected by such introductions.

[0015] The present invention relates to a composition comprising the following ingredients in dry form: (a) nigrosine, (b) wheat flour, and (c) whole eggs.

[0016] The term "composition" describes a mixture of two or more components. The components may be present in different proportions. The components are preferably in dry form in the composition of the present invention. The components may be in any dry form. Depending on the component, they may be in crystalline or amorphous form. The components may be in the form of crystalline or amorphous powder in the composition, or in another suitable form, for example, as a fine powder, granular material, or pellets. Usually, the composition according to the present invention is a free-flowing solid.

[0017] According to the present invention, the term "dry form" is understood to mean that the components to be included in the composition of the present invention should be essentially liquid-free, in particular free from aqueous solvents. By "essentially liquid-free", it is understood here that the components in the composition may themselves be present in solid form, since the residual liquid in the composition provided according to the present invention is insufficient to dissolve the components.

[0018] The residual liquid content may vary depending on the ingredients. In the case of wheat flour, the residual liquid content is preferably 20% by weight or less, 15% by weight or less, 10% by weight or less, 5% by weight or less, or more preferably 2% by weight or less, based on the total weight of the ingredients used in the composition. In the case of whole egg powder, the residual liquid content is preferably 10% by weight or less, 7% by weight or less, 5% by weight or less, or more preferably 2% by weight or less, based on the total weight of the ingredients used in the composition. Nigrosine powder preferably does not contain detectable incorporated residual liquid. When water is incorporated, it is bound water of crystallization.

[0019] The term "nigrosine" as used herein refers to a blue-black anionic dye from the group of water-soluble diaminophenazine compounds. Not only are there water-soluble nigrosines, but there are also alcohol-soluble or oil-soluble nigrosines. In the context of the present invention, water-soluble nigrosines having CAS number 8005-03-6 are preferred. Nigrosine is commercially available. Nigrosine can be obtained by heating nitrobenzene, aniline, and aniline hydrochloride with metallic iron and iron(III) chloride. Particularly preferred nigrosines are described in detail in the Examples.

[0020] The term "wheat flour" refers to a powder formed by grinding wheat grains. The term used herein encompasses flours of all types of wheat, including spelt, emmer, or einkorn varieties. Flours are categorized according to their caking properties, fineness (i.e., particle size), ash content, and protein content. Wheat flour may preferably be fine, medium-coarse, or coarse. The flour used in accordance with the present invention is preferably Type 405 flour. Other types that may also be used are Types 550, 812, 1050, or 1600. Particularly preferred flours are described in detail in the Examples.

[0021] The term "whole egg" as used herein refers to a product essentially comprising egg components (egg yolk and egg white). More specifically, this product should include egg-derived proteins, lipids, and carbohydrates. Preferably, according to the present invention, the eggs are chicken eggs, but other eggs, particularly poultry eggs, such as quail eggs or ostrich eggs, can also be used. According to the present invention, the whole egg components are also essentially in dry form. For this purpose, the whole eggs can be dried by suitable methods, such as freeze-drying. According to the present invention, this term also encompasses whole egg substitutes, such as vegetarian whole eggs or vegan whole eggs, or artificial compositions comprising whole egg components. More preferably, whole eggs in the context of the present invention are chicken egg powder. Particularly preferred whole eggs are described in detail in the Examples.

[0022] The composition of the present invention may be dissolved in an aqueous solvent such as water or an aqueous buffer solution. For this purpose, the composition is dissolved in a suitable amount of aqueous solvent. The dissolving operation can be assisted here by suitable measures, such as automatic or manual stirring. The dissolved composition can then be used as a test soil to evaluate the cleaning performance of a cleaning device for cleaning containers for human waste. Depending on the composition, the cleaning performance can be evaluated for a toilet bowl or a urinal. Suitable methods are also described elsewhere in this specification.

[0023] The composition of the present invention may be provided as a pre-mixture of the components. For this purpose, the components of the composition can be mixed together in a suitable, essentially dry form, for example, as a powder, preferably to produce a homogeneous mixture of the components. This can then be provided in a suitable package. The packaging here should prevent the composition from getting wet, thereby preventing unwanted dissolution of the components. Alternatively, the components of the composition of the present invention can also be provided individually in a suitable package, for example, as a so-called kit. In this case, the composition is provided from the individual components before or during the production of the test stain. Typically, the components are provided in predetermined amounts, and providing the composition from the components does not require measuring the components, but can be achieved by simply mixing the individual components in a packaged dry state or by directly dissolving them in an aqueous solvent.

[0024] Advantageously, the composition of the present invention, which is essentially composed of dry ingredients, can be stored for a long period of time. Currently used test stains contain liquid whole egg and therefore have a limited shelf life as aqueous compositions. In addition, the composition of the present invention allows the provision of standardized test stains because the components of the composition have good solubility in a specified amount of aqueous solvent. Therefore, variations or problems in the dissolution process that may occur when using liquid whole egg can be largely avoided.

[0025] The compositions of the present invention are preferably prepared in units of (Assigned Unity) The term "dispensing unit" in the context of the present invention is preferably understood to mean a specific amount of the composition. More preferably, the "dispensing unit" includes the amount of composition required for an added volume of 250 ml of aqueous solvent. Most preferably, the dispensing unit contains an amount of composition between 47.8 g and 62.2 g, most preferably 55 g.

[0026] Dispensing units can be advantageous because they do not require the user to weigh out the required amount of test soil, thus further simplifying the handling and use of the test soil.

[0027] The dosage units may be packaged in any suitable manner. Particularly suitable packaging forms are dosage packs or dosage units in other forms of packaging, such as bags, sachets, tubes, cups, cartons, etc. Thus, the compositions of the present invention may in particular take the form of dosage units, preferably dosage packs.

[0028] The above-mentioned preferred forms of packaging can be provided with identification information, such as overprints, tags, stickers, or labels, including graphic codes and / or RFID tags.The graphic code can be, for example, a one-dimensional barcode or a two-dimensional QR code.When this code is read, for example, by a smartphone or another mobile terminal, it can lead to an internet site, such as a website, where instructions for using the test stain and performing the test can be displayed to the user.When the RFID tag is read, for example, by a smartphone or another mobile terminal, it can also provide the user with instructions on how to apply the test stain and / or how to perform the test.This can further simplify the handling and use of the test stain.

[0029] Preferred embodiments of the compositions of the present invention are described below.

[0030] Nigrosine and whole egg are preferably in powder form. More preferably, the components are present in the composition in the following amounts, in each case relative to a volume of 250 ml of aqueous solvent added: (a) 0.8 g to 1.2 g, preferably 1.0 g, of nigrosine; (b) 30 g to 40 g, preferably 35 g, of flour; and (c) 17 g to 21 g, preferably 19 g, of whole egg. The composition thus has a total mass of 47.8 g to 62.2 g, preferably 55 g. In a preferred embodiment, the proportion of nigrosine is approximately 1.8% by weight, the proportion of flour is approximately 63.6% by weight, and the proportion of whole egg is approximately 34.6% by weight. The composition according to the present invention may be processed accordingly for any volume of aqueous solvent; see above for the definition of flour.

[0031] The composition preferably includes dried potato flakes as an additional ingredient. Typically, the dried potato flakes are present in an amount of 35 g to 45 g, preferably 40 g, per 250 ml of aqueous solvent added. In this case, the composition of the present invention has a total mass of 82.8 g to 107.2 g, preferably 95 g. Thus, in a preferred embodiment, the proportion of nigrosine is about 1.0% by weight, the proportion of wheat flour is about 36.9% by weight, the proportion of whole egg is 20% by weight, and the proportion of dried potato flakes is 42.1% by weight.

[0032] As used herein, the term "dried potato flakes" refers to aggregates consisting essentially of dried potato cells. Dried potato flakes are commercially available and are produced by processes known in the art. Typically, for this purpose, potatoes are boiled and processed into a slurry. This slurry is dried on a roll dryer to form a thin layer and then crushed into flakes of the desired size. Depending on the processing technique, different proportions of potato cells can be destroyed. In this way, different starch contents can also be adjusted. Particularly preferred dried potato flakes are described in detail in the Examples. However, the term also includes potato powder.

[0033] The present invention also relates to a method of using the above composition, which comprises the following ingredients in dry form: (a) nigrosine, (b) wheat flour, and (c) whole egg, to generate test stains for evaluating the cleaning action of cleaning devices for cleaning urinals for human waste.

[0034] It will be clear that a test stain must first be prepared by dissolving the composition of the present invention in an aqueous solvent. This can be achieved by the method described herein. The test stain is preferably prepared by dissolving the composition in an aqueous medium, more preferably, the aqueous solvent is water or an aqueous buffer solution. The test stain is then used to evaluate the cleaning action of the cleaning device. For this purpose, the test stain is applied to a urinal. This can be done uniformly or in spots on the inner and / or outer surface of the urinal. Methods for applying the test stain are known to those skilled in the art.

[0035] The term "cleaning device" as used herein is a broad term, but should have the usual and standard meaning understood by those skilled in the art. This term is not limited to a specific or suitable meaning. This term may refer, in particular, to a device configured to free materials to be cleaned from contaminants, but is not limited thereto. The cleaning device may in particular comprise at least one cleaning chamber for receiving the materials to be cleaned and a contacting device for contacting the materials to be cleaned with at least one cleaning fluid, for example at least one cleaning liquid and / or steam. For examples of possible cleaning devices, reference may be made to the prior art cited above.

[0036] Possible cleaning materials in the context of the present invention include all items that are conventionally understood by those skilled in the art. This expression is not limited to a specific or applicable meaning. This expression may in particular, but is not limited to, containers that can be used, for example, in hospitals or care departments, and that can hold, for example, at least 100 ml of solid or liquid waste, in particular 200 ml or even 500 ml. More particularly, these containers may be bedpans and / or urinals.

[0037] Thus, the washing device may in particular be configured as a washer-disinfector within the scope of, for example, ISO Standard Series 15883 Washer-disinfectors-Part 1: General requirements, terms and definitions and tests.

[0038] The term "test soil" used herein is a broad term, but should have the usual standard meaning understood by those skilled in the art. The test soil in the context of the present invention comprises the composition of the present invention in the dissolved form described herein. The test soil is suitable for wetting a test specimen. In addition, removal of the test soil from the test specimen by the cleaning method or cleaning device being evaluated is detectable. The test soil may specifically be configured as a paste-like mass visible to the human eye.

[0039] The term "test specimen" as used herein is a broad expression, but should have the usual and standard meaning understood by a person skilled in the art. This expression is not limited to a specific or applicable meaning. This term may in particular, but not exclusively, relate to a device or element that can be subjected to a cleaning method and has at least one surface that is cleaned during the cleaning method, to which a test soil may be applied before cleaning. In particular, the test specimen may be a container for holding human waste, in particular a toilet bowl and / or a urinal. The test specimen may therefore in particular be a test specimen within the scope of the pre-standard DIN ISO / TS 15883-5, Washer-disinfectors-Part 5: Test soils and methods for demonstrating cleaning efficacy.

[0040] The present invention further relates to a method of using the above composition, which comprises the following ingredients in dry form: (a) nigrosine, (b) wheat flour, and (c) whole egg, and dried potato flakes as an additional ingredient, to generate test soils for evaluating the cleaning action of cleaning devices for cleaning containers for human waste.

[0041] The present invention also relates to a method for producing test soils for evaluating the cleaning action of cleaning devices, particularly washer-disinfectors, for cleaning containers for human waste, comprising the step of dissolving the composition of the present invention in an aqueous medium.

[0042] The aqueous medium is preferably water or an aqueous buffer solution. The composition of the present invention is introduced into the aqueous medium and dissolved. The dissolution process may be assisted by physical methods. For this purpose, dissolution of the components of the composition of the present invention can be carried out by manual or automatic stirring. Both manual stirring and automatic stirring devices suitable for dissolution in the context of the present invention are known to those skilled in the art. Dissolution can additionally be promoted by heating the solution during dissolution or by using a heated aqueous medium as the solvent. Typically, the solution or solvent here is heated to a temperature within the range of 20°C to 40°C, preferably below 35°C, more preferably 25°C, 28°C, 30°C, or 35°C.

[0043] The present invention further relates to a test soil for evaluating the cleaning action of cleaning equipment, in particular a washer-disinfector, for cleaning containers for human waste, which test soil comprises the components of the composition of the present invention in an aqueous medium, preferably water, or which is obtainable by the method of the present invention.

[0044] The present invention relates to a method of using the test soil of the present invention to evaluate the cleaning action of a cleaning device for cleaning containers for human waste.

[0045] The test soil may comprise the components of the composition of the present invention, (a) nigrosine, (b) wheat flour, and (c) whole egg, in an aqueous medium, preferably water, and is used to preferably evaluate the cleaning action of a cleaning device for cleaning urinals.

[0046] The test soil may comprise the components of the composition of the present invention, (a) nigrosine, (b) wheat flour, and (c) whole egg, and additionally dried potato flakes, in an aqueous medium, preferably water, with which the cleaning action of a cleaning device for cleaning a toilet bowl is preferably evaluated.

[0047] The present invention also finally provides a method for evaluating the cleaning action of a cleaning device, in particular a washer-disinfector, for cleaning containers for human waste, comprising: (a) generating a test soil by the method of the present invention; (b) applying the test soil produced in step (a) to a container for human waste, particularly a toilet bowl or urinal; (c) cleaning the container from step (c) with the cleaning device being evaluated; and (d) evaluating the cleaning action of the cleaning device for cleaning a container for human waste by the amount of test soil present or removed; The present invention relates to a method, including:

[0048] The method of the present invention for evaluating the cleaning action of a cleaning device can preferably be used here to evaluate the cleaning action of a toilet bowl and / or a urinal with respect to human waste. Depending on the type of waste or the type of item to be cleaned (urinal or urinal), a suitable composition of the present invention can be selected accordingly. For urinals, it is preferred to use a composition that does not contain dried potato flakes, and for toilet bowls, a composition that contains dried potato flakes.

[0049] First, a test stain is produced using a composition of the present invention selected accordingly by dissolving the composition in an aqueous medium as described herein.

[0050] The test soil is applied to each test specimen and allowed to dry. The application can be uniform or spot-like on one or more interior and / or exterior surfaces. The test soil is preferably allowed to dry for about 5 to 10 minutes, more preferably 5 to 7 minutes. In this state, the test soil preferably forms a strong bond with the surface of the test specimen, but one that can be reversibly bonded by a washing operation.

[0051] The test specimens thus produced are washed in the washing equipment to be evaluated using a suitable washing program.

[0052] The washed test specimen is then evaluated with respect to the cleaning performance of the washing device or washing program used. For this purpose, preferably, the amount of test soil present or removed on the test specimen is determined and compared with a reference. The reference used can be a test specimen without test soil or an unwashed test specimen with test soil. Alternatively, the reference can also be a condition defined for the test specimen. The comparison here can be made by inspecting a measured parameter that is indicative of the presence or absence of test soil, or by comparison, preferably automatic comparison. Suitable parameters here can be parameters from the evaluation of image data or optical measurements. Suitable methods are well known to those skilled in the art.

[0053] The amount of test soil removed can be used to evaluate cleaning performance.The amount removed can serve as an evaluation index for cleaning performance here, and a large amount of test soil removed is an indicator of good cleaning performance, and a small amount of test soil removed is an indicator of poor cleaning performance.For this purpose, a scoring system can be used, which classifies cleaning performance into different categories according to the amount of test soil removed.

[0054] Further, without limiting the possible configurations, the following embodiments are specifically described in summary.

[0055] Embodiment 1: A composition comprising the following ingredients in dry form: (a) nigrosine, (b) wheat flour, and (c) whole eggs.

[0056] Embodiment 2: The composition of embodiment 1, wherein the nigrosine and whole egg are in powder form.

[0057] Embodiment 3: The composition of embodiment 1 or 2, wherein the ingredients are present in the composition in the following amounts, in each case relative to a volume of 250 ml of aqueous solvent added: (a) nigrosine 0.8 g to 1.2 g, preferably 1.0 g; (b) wheat flour 30 g to 40 g, preferably 35 g; and (c) whole eggs 17 g to 21 g, preferably 19 g.

[0058] Embodiment 4: The composition of any of embodiments 1 to 3, comprising dried potato flakes as an additional ingredient.

[0059] Embodiment 5: The composition of embodiment 4, wherein the dried potato flakes are present in an amount of 35 g to 45 g, preferably 40 g, per 250 ml volume of aqueous solvent added.

[0060] Embodiment 6: The composition of any of embodiments 1 to 5, in the form of a dosage unit, preferably a dosage pack, or another form of packaging, such as a bag, sachet, tube, cup, carton.

[0061] Embodiment 7: The composition of embodiment 6, wherein the packaging is provided with a label comprising a graphic code and / or an RFID tag.

[0062] Embodiment 8: A method of using a composition according to any one of embodiments 1 to 3 to generate a test soil for evaluating the cleaning action of a cleaning device for cleaning urinals for human waste.

[0063] Embodiment 9: A method of using a composition according to embodiment 4 or 5 to generate a test soil for evaluating the cleaning action of a cleaning device for cleaning a toilet bowl for human waste.

[0064] Embodiment 10: A method of use according to embodiment 8 or 9, wherein the test stain is generated by dissolving the composition in an aqueous medium.

[0065] Embodiment 11: A method for generating test soils for evaluating the cleaning action of cleaning devices, particularly washer-disinfectors, for cleaning containers for human waste, comprising dissolving a composition according to any one of embodiments 1 to 5 in an aqueous medium.

[0066] Embodiment 12: The method of embodiment 11, wherein the aqueous medium comprises water or an aqueous buffer.

[0067] Embodiment 13: A test soil for evaluating the cleaning action of cleaning equipment, in particular a washer-disinfector, for cleaning containers for human waste, the test soil comprising the components of the composition of any of embodiments 1 to 5 in an aqueous medium, preferably water, or obtained by the method of embodiment 11 or 12.

[0068] Embodiment 14: A method for evaluating the cleaning action of a cleaning device for cleaning a urinal or bedpan for human waste, using the test soil of embodiment 13.

[0069] Embodiment 15: A method of use according to embodiment 14, wherein the test soil comprises the components of the composition according to any one of embodiments 1 to 3 in an aqueous medium, preferably water, to evaluate the cleaning action of a cleaning device for cleaning urinals for human waste.

[0070] Embodiment 16: A method of use according to embodiment 14, wherein the test soil comprises the components of the composition according to embodiment 4 or 5 in an aqueous medium, preferably water, to evaluate the cleaning action of a cleaning device for cleaning a toilet bowl for human waste.

[0071] Embodiment 17: A method for evaluating the cleaning action of a cleaning device, in particular a washer-disinfector, for cleaning containers for human waste, comprising: (a) generating a test soil by the method of embodiment 11 or 12; (b) applying the test soil produced in step (a) to a container for human waste, particularly a toilet bowl or urinal; (c) cleaning the container from step (c) with the cleaning device being evaluated; and (d) evaluating the cleaning action of the cleaning device for cleaning a container for human waste by the amount of test soil present or removed; A method comprising: [Example]

[0072] The following examples are intended to illustrate the invention and in no way limit the scope of protection.

[0073] [Example 1] Test stain for toilet bowls Test soil for inset toilets: 1.0 g Nigrosine powder (CI 50420, water-soluble, for microscopy), 35 g Type 405 wheat flour, 40 g dried potato flakes (potato puree), and 19 g dried whole egg powder (spray-dried). Mix thoroughly and store in an airtight container. The mixture can be used for approximately 12 months. Before use, add the mixture to a pot and mix with 250 ml of lukewarm water for 2-3 minutes using an egg beater. To test the consistency of the mixture, first immerse the loop of the egg beater thoroughly into the mixture and then pull it back out. If the mixture has the appropriate consistency, it will gradually flow down the loop. After 5-10 seconds, the remaining mass of mixture on the beater will have a diameter of 40-50 mm. This is sufficient for staining one or two inset toilets or commodes. Apply the mixture to the inset toilets or commodes as directed. After application, allow the mixture to dry for 5-7 minutes. The mixture should be used within 3-4 hours.

[0074] [Example 2] Test stain for urinals Test stain for urinals: 1.0 g Nigrosine powder (CI 50420, water-soluble, for microscopy), 35 g Type 405 wheat flour, and 19 g dried whole egg powder (spray-dried). Mix well and store in an airtight container for approximately 12 months. Before use, add the mixture to a pot and mix with 250 ml of lukewarm water using an egg mixer for 2-3 minutes. Apply the mixture to / on the urinal as directed. After application, allow the mixture to dry for 5-7 minutes. This mixture should be used within 3-4 hours.

[0075] [Example 3] Cleaning action test The test soil is prepared as described in Examples 1 and 2, applied to a toilet bowl or urinal, and allowed to dry. The test specimens thus prepared are subjected to the cleaning and disinfecting method in a suitable manner in a cleaning device. The test soil remaining on the test specimen (before and after comparison) can be used to evaluate cleaning performance.

[0076] [Example 4] Comparison of test soils using Koller toilet bowls KMNE protective formulation for cleaning and disinfection tests (Koller): 1. Nigrosine solution: Stir 6g of nigrosine powder into 276ml of water that is hot enough to put your hand in. 2. Flour paste: Stir 53g of coarsely ground wheat flour into 369ml of cold water and boil for approximately 3 minutes. 3. Mix the solution and paste well and allow to cool to room temperature (approximately 35°C). 4. Add 3 freshly beaten eggs to the mixture and mix, then gradually add 100g of potato batter flakes and mix.

[0077] Final consistency as a stool substitute: When an egg beater is immersed (at a depth of 7 cm or more), a lump 4-5 cm in diameter should hang down for 5-10 seconds.

[0078] This assembly was compared to the assembly produced as described in Example 1. The results are shown in Figure 1. There are no significant differences in terms of suitability for testing properties.

Claims

1. A composition for producing a test soil for evaluating the cleaning action of a cleaning device for cleaning containers for human waste, comprising, in dry form, the following components: (a) nigrosine, (b) wheat flour, and (c) whole eggs; consisting of, or The following ingredients in dry form: (a) nigrosine, (b) wheat flour, (c) whole eggs, and (d) dried potato flakes; It consists of The components are in each case added in the following amounts to a volume of 250 ml of aqueous solvent: (a) 0.8 g to 1.2 g of nigrosine; (b) 30 g to 40 g of wheat flour, and (c) 17g to 21g of whole eggs; is present in the composition at If dried potato flakes are present, the dried potato flakes are present in the following amounts: (d) 35g to 45g dried potato flakes; is present in the composition at and The residual liquid content of the flour is 20% by weight or less, based on the total weight of the ingredients used in the composition; The residual liquid content of the whole egg is not more than 10% by weight based on the total weight of the ingredients used in the composition; and A composition wherein the nigrosine powder is free of detectable incorporated residual liquid, and where water is incorporated, the water is bound water of the crystal.

2. 10. The composition of claim 1, wherein the nigrosine and whole egg are in powder form.

3. 3. A composition according to claim 1 or 2 in the form of a dosage pack.

4. 4. The composition of claim 3, wherein the dispensing pack is provided with a label comprising a graphic code and / or an RFID tag.

5. 3. A method of using a composition according to claim 1 or 2 to produce test stains for assessing the cleaning action of cleaning devices for cleaning urinals for human waste.

6. 6. The method of claim 5, wherein the test stain is produced by dissolving the composition in an aqueous medium.

7. 10. A method for producing a test soil for evaluating the cleaning action of a cleaning device for cleaning containers for human waste, comprising the step of dissolving the composition of claim 1 or 2 in an aqueous medium.

8. 8. The method of claim 7, wherein the aqueous medium comprises water or an aqueous buffer solution.

9. 1. A method for assessing the cleaning action of a cleaning device for cleaning a container for human waste, comprising: (a) generating a test soil by the method of claim 7 or 8; (b) applying the test soil produced in step (a) to a container for human waste; (c) washing the container from step (c) with a washing device to be evaluated; and (d) assessing the cleaning performance of the cleaning device for cleaning a container for human waste by the amount of test soil present or removed. A method comprising:

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