When drying the print in a line oven it sometimes appears hazy. Why does this occur?

Upon further investigation with the customer, the printing conditions that caused this hazy appearance were discovered to be as follows. Mirror Ink was printed with a cylinder press and dried in a line dryer at a high temperature, thus the resultant hazy effect. The reason being: the initial drying at a high temperature. The recommended drying condition is 30 minutes at 80°C, but in this case the line dryer was used for 2 minutes at 100°C. When the substrate was dried at this high temperature with a great deal of solvent on it, the substrate was affected adversely and turned white.