If a comparison is made between Protein glue and water based emulsions for case making, it would be clearly understood that Protein glue is the most suited for the application. An illustration below will explain the theory. Average glue application (coating weight) for laminating (example): Emulsion adhesives: Wet Dry substance Water absorption 50-70 g/m² 50-55 % 25-35 g/m² Protein Glue: Wet Dry substance Water absorption + add. Restrain of water (modified glue) Effective water absorption 35-40 g/m² 50-55 % 17-20 g/m² 12 % 15-18 g/m² Reduction of Water Absorption 40 % This results in lesser warping of the case, better bonding and faster setting of the adhesive. Protein Glue keeps the water longer in the adhesive film which helps in improving the flatness of the case. Emulsion adhesive creates an adhesive film by water absorption into the porous mat...