US 9,585,796 B2  14  13  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.  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.  In one embodiment of the present invention the dispos› able 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 LaVon;  Ser. No. 11/140,888 to La Von et al.; Ser. No. 11/158,563 to  La Von 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  La Von 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.  Bleeding through becomes a larger issue when the sub› strate is a lower basis weight and/or breathable film or  nonwoven. Absorbent articles of the present invention may  use backsheets having a basis weight less than about 60 gsm,  less than about 40 gsm, or less than about 20 gsm. Said  backsheets may be breathable, having water vapor transmis› sion rates ( according to ASTM E-96/E-96M-05) greater than  about 100 g/m $^{2}$/24 hr (grams of water vapor per square  It may additionally be desired that there is substantial  contact/adherence to the substrate it faces to ensure that the  wetness indicator composition is evenly (top to bottom and  side to side) wetted and thus provides the full signal  intended. This can be accomplished by providing a wetness  indicator composition that has an optimized "open time"  such it is tacky enough for a long enough time to adhere to  the substrate, but not so long that it bleeds through the  substrate.  As briefly described in the Background of the Invention  above, the wetness indicator composition should not only  adhere to the substrate (e.g., backsheet) to which it initially  applied, but the wetness indicator composition should  adhere to the substrate (e.g., the dusting layer) it faces that  is inboard of the wetness indicator to ensure wicking of fluid  ( e.g., urine) to the wetness indicator composition after a  wetness event. That is, when a gap exists between the  wetness indicator composition and the inboard substrate  (e.g., the dusting layer) that it faces, fluid may not travel  from the absorbent core to the wetness indicator within the  desired time to signal a wetness event.  The wetness indicator may be applied to a substrate via  any means of liquid or semi-liquid application as known in  the art, including, but not limited to, slot coating, spraying,  gravure printing, ink jet printing, and digital printing. Alter- natively, the wetness indicator may be a solid or semi-solid  material affixed to a substrate via adhesive bonding, chemi› cal bonding or intermolecular force bonding. Multiple indi› cators may be applied to the same substrate in overlapping  or non-overlapping geometries. The solidification process  may be accelerated via the use of convective mass transport,  if evaporation of a solvent is required, or convective or  conductive heat transfer, e.g., cooling via air or chilled rolls,  etc.  In one alternative embodiment of the present invention a  portion of the absorbent article, such as part or all of the  topsheet, 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.  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; U.S. 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  Hundorf filed on Jun. 18, 2007; 60/936,085 to Ashton filed  on Jun. 18, 2007; 60/936,084 to Ashton filed on Jun. 18,  2007; 60/936,150 to Ashton filed on Jun. 18, 2007; 60/936,  146 to Asthon filed on Jun. 18, 2007; 60/936,037 to Ashton  filed on Jun. 18, 2007; and 61/091,799 to Hundorffiled on  Aug. 26, 2008. 