Abstract: Described are microfiber articles and methods and intermediates for their production, the microfiber articles being preferably produced from co-extruded multi-layer films, and the articles having a multi-layer construction that allows selection of the different layers to have different properties such that the article can have a desired combination of properties.

Abstract: A biological soil detector is provided, comprising: a solid support member; a specific indicator immobilized on the solid support member; and a retaining member holding the solid support thereon, the retaining member and solid support configured to facilitate contact between the solid support a surface. A method for the use of the foregoing detector is also provided, the method comprising: contacting the foregoing biological soil detector with a surface wherein the contacting initiates the modification of the specific indicator in the presence of bio soil; withdrawing the biological soil detector from the surface; and inspecting the solid support member of the detector for a detectable response to thereby determine whether the specific indicator immobilized on the solid support has interacted with biological soil.

Abstract: A biological soil detector is provided, the detector comprising: a solid support member; a specific indicator immobilized on the solid support member; and the solid support and specific indicator positioned to facilitate contact with a liquid used to contact a surface. In another aspect, the invention provides a method for detecting bio soil associated with a surface, comprising: contacting the surface with a liquid; after the liquid has contacted the surface, contacting the liquid with the solid support member and the specific indicator of the foregoing detector; and inspecting the solid support member for a detectable response to determine whether the specific indicator has interacted with biological soil.