To ensure optimum bonding with a stacked leather knife handle:
Clean both the tang and leather thoroughly to remove any dirt, oil, or residue.
Mix the epoxy according to the manufacturer's instructions.
Apply a thin layer of epoxy to the tang and the leather pieces.
Stack the leather pieces onto the tang, ensuring even distribution of adhesive.
Apply firm pressure to the handle for the recommended curing time to ensure proper bonding.
Allow the adhesive to cure according to the package instructions before using the knife.