Tips for Better Perfect Binding

• Hot Melt EVA Properties: less expensive per pound of material; longer usable life since it can be left in the glue pot and reheated numerous times; faster cure time; shorter wait period before books can be handled; weaker bond strength with coated stocks; requires a thicker layer of adhesive per book; inferior lay flat qualities. PUR Properties: superior bonding to coated stocks; excellent lay flat qualities; requires less adhesive per book; moisture cured, which limits usable life to a few hours once exposed to air with an open glue pot design; slow cure time; material cost is about three times that of EVA per pound; repeated exposure to fumes can be detrimental to health. —Harry Nguyen, Duplo USA