The 22nd international exhibition of detergents, cleansers, hygienic and cellulose products and related machinery, is underway at the Tehran International Fair grounds. Nearly 63 firms from Turkey, Germany, India, China, France, Italy, Spain, Greece, Malaysia, the United Arab Emirates, Taiwan and South Korea are participating in addition to 237 domestic firms, IRNA reported. The exhibition (April 24-27) is open daily to the public from 9 am to 4 pm.