esters, such as, citrate esters, e.g., monostearyl citrate and monocetyl citrate, glycolate esters, lactate esters; phospho› rus containing organic acids, such as, monostearyl phos› phate and monocetyl phosphates; ether carboxylic acids; N-acyl sarcosinic acids; N-acyl glutamic acids; N-acyl eth› ylenediaminetriacetic acid; alkane sulfonic acids; alpha› olefin sulfonic acids; alpha-sulfonic acid fatty acid methyl esters; sulfate esters; inorganic acids, such as, phosphoric acid; and combinations thereof. Examples of suitable basic stabilizers include, but are not limited to: monoetha› nolamine; diethanolamine; triethanolamine; dipropylenetri› amine; diiosopropyl amine; organic diamines, such as, but not limited to, 1,3-bis(methylamine)-cyclohexane, 1,3-pen› tanediamine; inorganic bases, such as, but not limited to, sodium hydroxide, magnesium hydroxide, and combinations thereof. 

[0058] The stabilizer, when present is typically employed in compositions at levels which are effective at stabilizing the colorant, from about 0.001 % to about 30%, from about 0.1% to about 15%, and also from about 1% to about 10%, by weight of the composition. 

Optional Additional Ingredients 

[0059] In one optional embodiment of the present inven› tion, the wetness indicator composition may include optional ingredients, including, but not limited to, surfac› tants, structural adjuncts, and combinations thereof. The optional additional ingredients, when present, are typically employed in compositions at levels which are effective at providing the benefits of the optional additional ingredient or ingredients, including from about 0.001 % to about 50%, from about 0.1 % to about 40%, and from about 1 % to about 35%, by weight of the composition. The optional ingredients and amounts disclosed in U.S. Pat. No. 6,904,865, issued Jun. 14, 2005 to Klofta, et al. may be used in the wetness indicator compositions of the present inventions. 

Substrate 

[0060] In one embodiment of the present invention, the wetness indicator composition of the present invention may be on and/or in a substrate. When present on a substrate, the wetness indicator composition 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, woven fabrics, nonwoven fabrics, films, sponges, and combinations thereof. The substrate may comprise 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 indicator 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 back› sheet, 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 indicator composition is applied to the absorbent article as a whole. 

[0061] The manufacture of substrates, absorbent articles and structural components thereof, for use herein form no part of this invention. The following discussion is for 

convenience of formulation, but is not intended to limit the type of substrate used herein. 

[0062] In one embodiment of the present invention the disposable absorbent article is a disposable diaper. Typically, modern disposable diapers comprise a liquid pervious top› sheet a liquid impervious backsheet; an absorbent core which may be positioned between at least a portion of the topsheet and the backsheet; side panels; elasticized leg cuffs; an elastic waist feature; and a fastening system. In one embodiment opposing sides of the disposable diaper 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. 5,518,801 to Chappell, et al.; U.S. Pat. No. 4,573,986 to Minetola et al.; U.S. Pat. No. 3,929,135, to Thompson; U.S. Pat. No. 4,463,045 to Ahr, et al.; U.S. Pat. No. 4,609,518 to Curro et al.; U.S. Pat. No. 4,629,643 to Curro et al.; U.S. Pat. No. 5,037,416 to Allen et al.; U.S. Pat. No. 5,269,775 to Freeland et al.; U.S. Pat. No. 4,610,678 to Weisman et al.; U.S. Pat. No. 4,673,402 to Weisman et al.; U.S. Pat. No. 4,888,231 to Angstadt; U.S. Pat. No. 5,342,338 to Roe; U.S. Pat. No. 5,260,345 to DesMarais et al.; U.S. Pat. No. 5,026,364 to Robertson; U.S. Pat. No. 3,848,594 to Buell; U.S. Pat. No. 4,846,815 to Scripps; U.S. Pat. No. 4,946,527 to Battrell; U.S. Pat. No. 4,963,140 to Robertson et al.; U.S. Pat. No. 4,699,622 to Toussant et al.; U.S. Pat. No. 5,591, 152 to Buell et al.; U.S. Pat. No. 4,938,753 to Van Gompel, et al.; U.S. Pat. No. 5,669,897 to La Von, et al.; U.S. Pat. No. 4,808,178 to Aziz et al.; U.S. Pat. No. 4,909,803 to Aziz et al.: U.S. Pat. No. 4,695,278 to Lawson and U.S. Pat. No. 4,795,454 issued to Dragoo; and U.S. Ser. No. 10/770,043 to LaVon; U.S. Pat. No. 7,318,820 to LaVon et al.; U.S. Pat. No. 6,962,578 to La Von; U.S. Pat. No. 7,377,914 to La Von; Ser. No. 11/715,976 to LaVon; Ser. No. 10/880,128 to LaVon; Ser. No. 11/131,799 to LaVon et al., Ser. No. 11/133,818 to La Von et al.; Ser. No. 11/135,689 to La Von; Ser. No. 11/140,888 to La Von et al.; Ser. No. 11/158,563 to LaVon et al.; Ser. No. 11/159,916 to La Von et al., Ser. No. 11/197,197 to La Von et al.; Ser. No. 11/210,345 to La Von et al.; Ser. No. 11/224,462 to La Von et al.; Ser. No. 11/231,511 to La Von et al.; Ser. No. 11/231,512 to La Von et al.; Ser. No. 11/231,500 to LaVon et al.; U.S. Pat. No. 7,320,684 to LaVon et al.; Ser. No. 11/286,934 to La Von et al.; Ser. No. 11/286,614 to LaVon; Ser. No. 11/286,612 to LaVon; Ser. No. 11/700,585 to LaVon et al.; Ser. No. 11/709,500 to LaVon et al.; Ser. No. 11/713,906 to La Von et al.; Ser. No. 11/728,127 to La Von et al.; Ser. No. 61/073,154 to La Von; and 61/073,169 to LaVon; US Pub. Nos. 2004/0162536 to Becker filed on Feb. 11, 2004; 2007/0167928 to Becker filed on Mar. 13, 2007; 2007/0179464 to Becker filed on Mar. 13, 2007; 2007/0156108 to Becker filed on Mar. 13, 2007; and 2004/0167486 to Busam filed on Feb. 11, 2004; US Ser. Nos. 60/936,102 to Hundorffiled on Jun. 18, 2007; 60/936, 109 to Hundorf filed on Jun. 18, 2007; 60/936,149 to 

