Although the adhesives were the same one, the adhesives of good sample was transferred to AL surface, and poor sample was the cohesion failure of adhesives layer after peeling under 135℃ atmosphere. From this, it was understood that heat resistance of poor sample is lower than good sample. It can consider that the curing agent of poor sample permeated the ink layer, the curing agent in the adhesive layer was insufficient, and heat resistance became low.