To monitor using of color materials in available foods in Ha Noi and Hai Phong city

In 1998, 186 samples in Hanoi and 154 samples in Hai Phong city of 13 kinds of retail color processed foods were examined. Survey the knowledge of hygiene and safe food of 60 consumers and sellers in Hanoi and 100 consumers and sellers in Hai Phong city. Results: the rate of using unrecommended coloring in Hanoi was 43.4%, and in Hai Phong was 39.5%. 89.3%-100% of retail coloring packages in markets were illegal. In 2002, the rate of using harmful coloring in processing retail food in Hanoi was decreased significantly