Feb. 11, 2016  9  US 2016/0038628 Al  acids, C23-60 carboxylic acids, hydrogenated vegetable oils,  polymers, sorbitan esters and other high molecular weight  esters.  [0064]  The wetting agent can be a surfactant or a mixture of  surfactants. The surfactants can be non-ionic surfactants or  ionic surfactants. The ionic surfactants can be either posi› tively charged or negatively charged or have both cationic and  anionic charges where such a molecular structure is termed to  amphoteric. The examples of non-ionic surfactants include  alkyl poly( ethylene oxide) such as copolymers of poly( eth› ylene oxide) and poly(propylene oxide) ( commercially called  Poloxamers or Poloxamines ), alkyl polyglucosides such as  octyl glucoside and decyl maltoside, fatty alcohols such as  cetyl alcohol, oleyl alcohol, cocamide MEA and cocamide  DEA. The examples of ionic surfactants include anionic ( e.g.,  based on sulfate, sulfonate or carboxylate anions) surfactants  such as s(SDS), ammonium lauryl sulfate and other alkyl  sulfate salts, Sodium laureth sulfate, also known as sodium  lauryl ether sulfate (SLES), Alkyl benzene sulfonate, Soaps,  or fatty acid salts; and Cationic ( e.g., based on quaternary  ammonium cations) surfactants such as Cetyl trimethylam› monium bromide (CTAB) a.k.a. hexadecyl trimethyl ammo› nium bromide, and other alkyltrimethylammonium salts,  Cetylpyridinium chloride (CPC), Polyethoxylated tallow  amine (POEA), Benzalkonium chloride (BAC), Benzetho› nium chloride (BZT); or Zwitterionic (amphoteric) surfac› tants such as Dodecyl betaine, Dodecyl dimethylamine oxide,  Cocamidopropyl betaine, Coco ampho glycinate. Alterna› tively, the wetting agents may also be hydrophilic molecules.  The hydrophilic molecules may be small molecules such as  sucrose, glucose and glycerol. The hydrophilic molecules  may also be polymers such as polyethylene glycol and its  copolymers.  [0065]  In one embodiment of the present invention, the  wetness indicating composition of the present invention may  be on and/or in a substrate. When present on a substrate, the  wetness indicator formulation will typically be placed on  and/or in a substrate where the substrate will be contacted by  a liquid, such as water, urine, menses, blood and the like. The  substrate may include, but is not limited to, a structural com› ponent, such as woven fabrics, nonwoven fabrics, films,  sponges, and combinations thereof. The substrate may com› prise synthetic and/or natural materials. In one embodiment  of the present invention the optional substrate may be an  article in its own right, such as, a continuous nonwoven fabric.  In another embodiment of the present invention the substrate  to which the wetness indicating composition may be applied  or otherwise affixed comprises any one, or a combination of,  structural components of an absorbent article, including, but  not limited to, the backsheet, topsheet, fasteners, absorbent  material, etc., or may be a separate element added or applied  to the product. In one optional embodiment of the present  invention the wetness indicating composition is applied to the  absorbent article as a whole. In some embodiments, the wet› ness indicating composition is a single layer. Such a single  layer may be applied to a substrate or structural component.  In some embodiments, the single-layer formulation may be  disposed between the backsheet and the absorbent core, in  other embodiments, between the topsheet and the absorbent  core.  [0066]  The indicating material may be coated over a sur› face of said substrate as either a) a monochromic color  scheme alone, bi-chromic, or multiple colors, b) in various  shapes and sizes, c) graphics of patterns or alpha numeric  symbols and words, or combinations thereof. The color tran› sition may be from being either a) colored to uncolored, b)  uncolored to colored, c) colored to different colored, or d) a  combination of a) and b) and c).  [0067]  The following discussion is for convenience of for› mulation, but is not intended to limit the type of substrate used  herein.  [0068]  In one embodiment of the present invention the  absorbent article is a disposable diaper. FIG.  1  is a plan view  of a diaper  20  of the present invention in a flat-out, state with  portions of the structure being cut-away to more clearly show  the construction of the diaper  20.  The portion of the diaper  20,  which faces the wearer, is oriented towards the viewer. As  shown in FIG.  1,  the diaper  20  preferably comprises a liquid  pervious topsheet  24;  a liquid impervious backsheet  26;  an  absorbent core  28  that is preferably positioned between at  least a portion of the top sheet  24  and the backsheet  26;  side  panels  30;  elasticized leg cuffs  32;  an elastic waist feature  34;  and a fastening system generally designated  40.  The diaper  has a wetness indicator  60.  The diaper  20  is shown in FIG.  1  to have a first waist region  36,  a second waist region  38  opposed to the first waist region  36  and a crotch region  37  located between the first waist region  36  and the second waist  region  38.  The periphery of the diaper  20  is defined by the  outer edges of the diaper  20  in which longitudinal edges  50  run generally parallel to the longitudinal centerline  100  of the  diaper  20  and end edges  52  run between the longitudinal  edges  50  generally parallel to the lateral centerline  110  of the  diaper  20.  [0069]  In one embodiment opposing sides of the article  may be seamed or welded to form a pant. This allows the  article to be used as a pull-on type diaper, such as a training  pant. Additional illustrative, but non-limiting, information on  construction, assembly, and the various components (includ› ing backsheets, dusting layers, upper and lower covering  sheets, and webs) of disposable diapers may be found in U.S.  Pat. No. 3,860,003 to Buell; U.S. Pat. No. 5,151,092 to Buell;  U.S. Pat. No. 5,221,274 to Buell; U.S. Pat. No. 5,554,145 to  Roe et al. on Sep. 10, 1996; U.S. Pat. No. 5,569,234 to Buell  et al.; U.S. Pat. No. 5,580,411 to Nease et al.; U.S. Pat. No.  6,004,306 to Robles et al.; U.S. Pat. No. 5,938,648 to La Von  et al.; U.S. Pat. No. 5,865,823 to Curro; U.S. Pat. No. 5,571,  096 to Dobrin et al.; U.S. Pat. No. 7,318,820 to La Von et al.;  U.S. Pat. No. 6,962,578 to La Von; U.S. Pat. No. 7,377,914 to  LaVon;  [0070]  In one alternative embodiment of the present inven› tion a portion of the absorbent article, such as part or all of the  top sheet, part or all of the barrier leg cuffs and the like, may be  optionally coated with a lotion, as is known in the art.  Examples of suitable lotions include, but are not limited to,  those described in U.S. Pat. No. 5,607,760 to Roe on; U.S.  Pat. No. 5,609,587 to Roe; U.S. Pat. No. 5,635,191 to Roe et  al.; U.S. Pat. No. 5,643,588 to Roe et al.; and U.S. Pat. No.  5,968,025 to Roe et al.  [0071]  The present invention is illustrated by the following  examples, which are merely for the purpose ofillustration and  are not to be regarded as limiting the scope of the invention or  the manner in which it can be practiced. Unless specifically  indicated otherwise, parts and percentages are given by  weight. For Example 1, the bromocresol green (free acid) is  EXAMPLES  Substrate and Absorbent Article 