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Adhesives and primer compositions that include water, a polymer and a pH indicator. The adhesives and primers have a visually-detectable color when wet, and preferably dry to a clear or transparent film, while having good flow and spreadability. The adhesives and primers provide a visual indication

Adhesives and primer compositions that include water, a polymer and a pH indicator. The adhesives and primers have a visually-detectable color when wet, and preferably dry to a clear or transparent film, while having good flow and spreadability. The adhesives and primers provide a visual indication of wetness by including a pH indicator such that when the composition is wet, the pH indicator is colored such that the color and the intensity of the color provides a visual indication of wetness; sufficiency of thickness; and uniformity of application of the adhesive or primer.

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1. A wet wallpaper adhesive composition comprising water, an adhesive polymer, a pH adjuster that evaporates when the composition is dried, and a pH indicator, wherein said pH indicator provides a visible color when wet and provides no visible color when dry.2. The adhesive of claim 1, wherein said

1. A wet wallpaper adhesive composition comprising water, an adhesive polymer, a pH adjuster that evaporates when the composition is dried, and a pH indicator, wherein said pH indicator provides a visible color when wet and provides no visible color when dry.2. The adhesive of claim 1, wherein said wallpaper adhesive comprises, water from about 20% to about 95% by weight, based on the total weight of the composition, an adhesive polymer from about 5% to about 80% by weight, based on the total weight of the composition, a polymer stabilizer from about 0% to about 2% by weight, based on the total weight of the composition, a humectant from about 0% to about 30% by weight, based on the total weight of the composition, a biocides from about 0% to about 2% by weight, based on the total weight of the composition, a defoamer from about 0% to about 1% by weight, based on the total weight of the composition, a pH adjuster from about 0% to about 20% by weight, based on the total weight of the composition, and a pH Indicator from about 0.001% to about 5% by weight, based on the total weight of the composition.3. The adhesive of claim 1, wherein said pH indicator is selected from the group consisting of 6,8-dinitro-2,4-(1H)quinazolinedione; p-nitrophenol; o-cresolphthalein; ethyl bis(2,4-dimethylphenyl) ethanoate; phenolphthalein; thymolphthalein; 1,3,5-trinitrobenzene; 2,4,6-trinitrotoluene; and combinations thereof.4. The adhesive of claim 3, wherein said pH indicator is selected from the group consisting of thymolphthalein, phenolphthalein, and combinations thereof.5. The adhesive of claim 1, wherein said pH indicator comprises from about 0.001% to about 5% by weight, based on the total weight of the composition.6. The adhesive of claim 5, wherein said pH indicator comprises from about 0.01% to about 0.1% by weight, based on the total weight of the composition.7. The adhesive of claim 1, wherein said adhesive polymer is selected from the group consisting of cellulose, starch, polyvinyl acetate and derivatives and copolymers thereof, polyvinyl alcohol and derivatives and copolymers thereof, latex and derivatives and copolymers thereof, acrylics and copolymers thereof, and combinations thereof.8. The adhesive of claim 1, wherein said adhesive polymer comprises from about 5% to about 80% by weight, based on the total weight of the composition.9. The adhesive of claim 7, wherein said adhesive polymer is starch.10. The adhesive of claim 9, wherein said starch is selected from the group consisting of corn starch, wheat starch, and combinations thereof.11. The adhesive of claim 9, wherein said adhesive polymer comprises from about 5% to about 40% by weight, based on the total weight of the composition.12. The adhesive of claim 7, wherein said adhesive polymer is cellulose.13. The adhesive of claim 12, wherein said adhesive polymer comprises from about 5% to about 40% by weight, based on the total weight of the composition.14. The adhesive of claim 1, further comprising an additive selected from the group consisting of a biocide, polymer stabilizer, rheology control agent, defoamer, pH adjuster, humectant, and combinations thereof.15. The adhesive of claim 14, wherein said biocide is selected from the group consisting of 4,4-dimethoxazolidine, 2(hydroxymethyl)amino ethanol, Troysan Polyphase AF-1, methyl benzimidazole-2-yl carbamate, 1,3-dihydroxymethyl-5,5-dimethylhydantoin, 1-hydroxymethyl-5,5-dimethylhydantoin, 2-n-octyl-4-isothiazolin-3-one, and combinations thereof.16. The adhesive of claim 14, wherein said biocide wherein comprises from about 0.01% to about 2% by weight, based on the total weight of the composition.17. The adhesive of claim 14, wherein said polymer stabilizer comprises from about 0.01% to about 2% by weight, based on the total weight of the composition.18. The adhesive of claim 14, wherein said rheology control agent comprises from about 0.1% to about 25% by weight, based on the total weight of the composition.19. The adhesive of claim 14, wherein said defoamer comprises from about 0.01% to about 4% by weight, based on the total weight of the composition.20. The adhesive of claim 14, wherein said pH adjuster comprises from about 0.01% to about 20% by weight, based on the total weight of the composition.21. The adhesive of claim 14, wherein said humectant comprises from about 0.1% to about 20% by weight, based on the total weight of the composition.22. A wet wallpaper primer composition comprising water, a polymer, a pH indicator, and a pH adjuster that evaporates when the composition is dried, wherein said pH indicator provides a visible color when wet and provides no visible color when dry.23. The primer of claim 22, wherein said primer comprises, water from about 50% to about 95% by weight, based on the total weight of the composition, a polymer from about 5% to about 50% by weight, based on the total weight of the composition, a rheology control agent from about 0% to about 8% by weight, based on the total weight of the composition, a biocides from about 0% to about 2% by weight, based on the total weight of the composition, a co-solvent from about 0% to about 5% by weight, based on the total weight of the composition, a pigment from about 0% to about 35% by weight, based on the total weight of the composition, a pH adjuster from about 0% to about 20% by weight, based on the total weight of the composition, and a pH Indicator from about 0.001% to about 5% by weight, based on the total weight of the composition.24. The primer of claim 22, wherein said pH indicator is selected from the group consisting of 6,8-dinitro-2,4-(1H)quinazolinedione; p-nitrophenol; o-cresolphthalein; ethyl bis(2,4-dimethylphenyl) ethanoate; phenolphthalein; thymolphthalein; 1,3,5-trinitrobenzene; 2,4,6-trinitrotoluene; and combinations thereof.25. The primer of claim 24, wherein said pH indicator is thymolphthalein, phenolphthalein, and combinations thereof.26. The primer of claim 22, wherein said pH indicator comprises from about 0.001% to about 5% by weight, based on the total weight of the composition.27. The primer of claim 26, wherein said pH indicator comprises from about 0.01% to about 0.1% by weight, based on the total weight of the composition.28. The primer of claim 22, wherein said polymer is selected from the group consisting of acrylic based polymers and copolymers thereof, vinyl acetate based polymers and copolymers thereof, styrene butadiene rubbers and copolymers thereof, latex and copolymer thereof, and combinations thereof.29. The primer of claim 22, wherein said polymer comprises from about 5% to about 50% by weight, based on the total weight of the composition.30. The primer of claim 28, wherein said polymer is an acrylic based polymer or a copolymer thereof.31. The primer of claim 28, wherein said polymer is a vinyl acetate based polymer or a copolymer thereof.32. The primer of claim 22, further comprising an additive selected from the group consisting of a biocide, polymer stabilizer, rheology control agent, defoamer, pH adjuster, humectant, and combinations thereof.33. The primer of claim 32, wherein said biocide is selected from the group consisting of 4,4-dimethoxazolidine, 2(hydroxymethyl)amino ethanol, Troysan Polyphase AF-1, methyl benzimidazole-2-yl carbamate, 1,3-dihydroxymethyl-5,5-dimethylhydantoin 1-hydroxymethyl-5,5-dimethylhydantoin, 2-n-octyl-4-isothiazolin-3-one, and combinations thereof.34. The primer of claim 32, wherein said biocide wherein comprises from about 0.01% to about 2% by weight, based on the total weight of the composition.35. The primer of claim 32, wherein said polymer stabilizer comprises from about 0.01% to about 2% by weight, based on the total weight of the composition.36. The primer of claim 32, wherein said rheology control agent comprises from about 0.1% to about 25% by weight, based on the total weight of the composition.37. The primer of claim 32, wherein said defoamer comprises from about 0.01% to about 4% by weight, based on the total weight of the composition.38. The primer of claim 32, wherein said pH adjuster comprises from about 0.01% to about 20% by weight, based on the total weight of the composition.39. The primer of claim 32, wherein said humectant comprises from about 0.1% to about 20% by weight, based on the total weight of the composition.40. In a wet adhesive composition comprising, water and an adhesive polymer, the improvement comprising the addition of a pH adjuster that evaporates when the composition is dried, and a sufficient amount of a pH indicator such that the pH indicator imparts a visible color to said adhesive composition when said adhesive composition is wet and does not impart a visible color to said adhesive composition when said adhesive composition is dry.41. The adhesive of claim 40, wherein said adhesive is a wallpaper adhesive.42. The adhesive of claim 40, wherein said pH indicator is selected from the group consisting of 6,8-dinitro-2,4-(1H)quinazolinedione; p-nitrophenol; o-cresolphthalein; ethyl bis(2,4-dimethylphenyl) ethanoate; phenolphthalein; thymolphthalein; 1,3,5-trinitrobenzene; 2,4,6-trinitrotoluene; and combinations thereof.43. The adhesives of claim 42, wherein said pH indicator is thymolphthalein, phenolphthalein, and combinations thereof.44. The adhesive of claim 40, wherein said pH indicator comprises from about 0.001% to about 5% by weight, based on the total weight of the composition.45. The adhesive of claim 44, wherein said pH indicator comprises from about 0.01% to about 0.1% by weight, based on the total weight of the composition.46. The adhesive of claim 40, wherein said adhesive polymer is selected from the group consisting of cellulose, starch, polyvinyl acetate and derivatives and copolymers thereof, polyvinyl alcohol and derivatives and copolymers thereof, latex and derivatives and copolymers thereof, acrylics and copolymers thereof, and combinations thereof.47. The adhesive of claim 46, wherein said adhesive polymer is starch.48. The adhesive of claim 47, wherein said adhesive polymer comprises from about 5% to about 40% by weight, based on the total weight of the composition.49. The adhesive of claim 46, wherein said adhesive polymer is cellulose.50. The adhesive of claim 49, wherein said adhesive polymer comprises from about 5% to about 40% by weight, based on the total weight of the composition.51. The adhesive of claim 40, further comprising an additive selected from the group consisting of a biocide, polymer stabilizer, rheology control agent, defoamer, pH adjuster, humectant, and combinations thereof.52. The adhesive of claim 51, wherein said biocide is selected from the group consisting of 4,4-dimethoxazolidine, 2(hydroxymethyl)amino ethanol, Troysan Polyphase AF-1, methyl benzimidazole-2-yl carbamate, 1,3-dihydroxymethyl-5,5-dimethylhydantoin, 1-hydroxymethyl-5,5-dimethylhydantoin, 2-n-octyl-4-isothiazolin-3-one, and combinations thereof.53. The adhesive of claim 52, wherein said biocide comprises from about 0.01% to about 2% by weight, based on the total weight of the composition.54. The adhesive of claim 51, wherein said polymer stabilizer comprises from about 0.01% to about 2% by weight, based on the total weight of the composition.55. The adhesive of claim 51, wherein said rheology control agent comprises from about 0.1% to about 25% by weight, based on the total weight of the composition.56. The adhesive of claim 51, wherein said defoamer comprises from about 0.01% to about 4% by weight, based on the total weight of the composition.57. The adhesive of claim 51, wherein said pH adjuster comprises from about 0.01% to about 20% by weight, based on the total weight of the composition.58. The adhesive of claim 51, wherein said humectant comprises from about 0.1% to about 20% by weight, based on the total weight of the composition.59. A method of adhering a paper to a wall comprising, applying a wet, colored adhesive to said wall or to a back surface of said paper, and prior to adhering said back surface to said wall, inspecting the adhesive for continuous color on the entire area where adhesive was applied, and then applying more of said wet, colored adhesive or more water where the adhesive is colorless, and then adhering said paper to said wall, and allowing said wet, colored adhesive to dry and become colorless.60. The method of claim 59, wherein said colored adhesive is a composition comprising water, an adhesive polymer, and a pH indicator, wherein said pH indicator provides a visible color when wet and provides no visible color when dry.61. The methods of claim 60, wherein said pH indicator is thymolphthalein, phenolphthalein, and combinations thereof.62. The method of claim 60, wherein said pH indicator comprises from about 0.001% to about 5% by weight, based on the total weight of the composition.63. The method of claim 62, wherein said pH indicator comprises from about 0.01% to about 0.1% by weight, based on the total weight of the composition.64. The method of claim 60, wherein said adhesive polymer is selected from the group consisting of cellulose, starch, polyvinyl acetate and derivatives and copolymers thereof, polyvinyl alcohol and derivatives and copolymers thereof, latex and derivatives and copolymers thereof, acrylics and copolymers thereof, and combinations thereof.65. The method of claim 60, further comprising an additive selected from the group consisting of a biocide, polymer stabilizer, rheology control agent, defoamer, pH adjuster, humectant, and combinations thereof.66. A wet wallpaper activator solution comprising water, an adhesive polymer, a pH indicator, and a pH adjuster that evaporates when the composition is dried, wherein said pH indicator provides a visible color when wet and provides no visible color when dry.67. The wallpaper activator of claim 66, wherein said wallpaper activator comprises, water from about 60% to about 99.1% by weight, based on the total weight of the composition, an adhesive based adhesive polymer from about 0.1% to about 40% by weight, based on the total weight of the composition, a rheology control agent from about 0% to about 20% by weight, based on the total weight of the composition, a biocide from about 0% to about 2% by weight, based on the total weight of the composition, a co-solvent from about 0% to about 5% by weight, based on the total weight of the composition, a pigment from about 0% to about 35% by weight, based on the total weight of the composition, a pH adjuster from about 0% to about 20% by weight, based on the total weight of the composition, and a pH Indicator from about 0.001% to about 5% by weight, based on the total weight of the composition.68. A method of applying a paper to a wall comprising,applying a wet, colored adhesive to said wall or to a surface of said paper to provide said wall or said surface of said paper with a color intensity, and prior to adhering said adhesive to said paper or to said surface of said wall, inspecting said color intensity of said applied adhesive to determine the uniformity of said color intensity, and where said color intensity is uneven, spreading said wet, colored adhesive on said wall or said surface of said paper to achieve a uniform color intensity; or adding additional wet, colored adhesive to said wall or said surface of said paper to achieve a uniform color intensity; or adding water to said wall or said back surface to achieve a uniform color intensity.