before occupational health education revealed that the workers had worn short sleeved shirt and that they unsuitably used cotton mask as personal protective equipment. After occupational health education, thirty (96.8%) workers were accustomed to wearing long sleeved shirt and trousers. Thirty-one (100.0%) always washed their hands before lunch and after the work. Twenty-nine (93.5%) regularly took a bath and changed dresses after the work. Thirty (96.8%) had a regular habit to use the appropriate mask (3M, 9322) all day