A process for manufacturing a water soluble product comprising the steps of: providing a water soluble fibrous first ply; providing a water soluble fibrous second ply formed on a surface other than said first ply, wherein said second ply is separate from said first ply; superposing said first ply and said second ply; and joining a first portion of said first ply to a second portion of said second ply to form said water soluble product, the process further comprising the steps of: providing a fibrous first layer; providing a fibrous second layer facing said fibrous first layer, said second layer comprising a first plurality of water soluble first particles distributed within said second layer, said first layer and said second layer together forming said first ply; providing a fibrous third layer; providing a fibrous fourth layer facing said fibrous third layer, said fourth layer comprising a second plurality of water soluble second particles distributed within said fourth layer, said third layer and said fourth layer together forming said second ply, wherein said first layer is oriented towards a first ply belt side and said second layer is oriented towards a first ply air side, wherein said first ply air side is opposite said first ply belt side, wherein said third layer is oriented towards a second ply belt side and said fourth layer is oriented towards a second ply air side, wherein said second ply air side is opposite said second ply belt side, wherein said process further comprises the step of positioning said first ply belt side and said second ply belt side to face away from one another prior to joining said first ply and said second ply, and wherein said first layer contains fewer first particles than said second layer and said third layer contains fewer second particles than said fourth layer. providing a water soluble fibrous first ply; providing a water soluble fibrous second ply formed on a surface other than said first ply, wherein said second ply is separate from said first ply; superposing said first ply and said second ply; and joining a first portion of said first ply to a second portion of said second ply to form said water soluble product, the process further comprising the steps of: providing a fibrous first layer; providing a fibrous second layer facing said fibrous first layer, said second layer comprising a first plurality of water soluble first particles distributed within said second layer, said first layer and said second layer together forming said first ply; providing a fibrous third layer; providing a fibrous fourth layer facing said fibrous third layer, said fourth layer comprising a second plurality of water soluble second particles distributed within said fourth layer, said third layer and said fourth layer together forming said second ply, wherein said first layer is oriented towards a first ply belt side and said second layer is oriented towards a first ply air side, wherein said first ply air side is opposite said first ply belt side, wherein said third layer is oriented towards a second ply belt side and said fourth layer is oriented towards a second ply air side, wherein said second ply air side is opposite said second ply belt side, wherein said process further comprises the step of positioning said first ply belt side and said second ply belt side to face away from one another prior to joining said first ply and said second ply, and wherein said first layer contains fewer first particles than said second layer and said third layer contains fewer second particles than said fourth layer. providing a fibrous first layer; providing a fibrous second layer facing said fibrous first layer, said second layer comprising a first plurality of water soluble first particles distributed within said second layer, said first layer and said second layer together forming said first ply; providing a fibrous third layer; providing a fibrous fourth layer facing said fibrous third layer, said fourth layer comprising a second plurality of water soluble second particles distributed within said fourth layer, said third layer and said fourth layer together forming said second ply, wherein said first layer is oriented towards a first ply belt side and said second layer is oriented towards a first ply air side, wherein said first ply air side is opposite said first ply belt side, wherein said third layer is oriented towards a second ply belt side and said fourth layer is oriented towards a second ply air side, wherein said second ply air side is opposite said second ply belt side, wherein said process further comprises the step of positioning said first ply belt side and said second ply belt side to face away from one another prior to joining said first ply and said second ply, and wherein said first layer contains fewer first particles than said second layer and said third layer contains fewer second particles than said fourth layer.