1. Pibulwitthayalai School, Lopburi, Thailand
2. Faculty of science and technology, Thepsatri Rajabhat University, Lopburi, Thailand
3. Faculty of science and technology, Nakhon Pathom Rajabhat University, Nakhon Pathom, Thailand
4. Center of Excellence in Glass Technology, Nakhon Pathom Rajabhat University, Nakhon Pathom, Thailand