The chemical treatments such as desizing, scouring, caustic soda mercerization, ammonia mercerization at -33°C and bleaching were carried out on jute fabrics. Then dyeing was done with various reactive dyes applying by standard procedure to investigate the change in different properties like light fastness, moisture regain and nitrogen content has been done on undyed and dyed jute products. It was observed that the moisture regain percentage of the jute fabrics increased after different treatments and the moisture regain percentage of dyed fabrics decreased in all the cases. The nitrogen content percentage of the ammonia treated and dyed fabrics were higher than other treated and undyed jute fabrics. Therefore light fastness properties of the ammonia treated and dyed fabrics will be adequate. So, it can be concluded that anhydrous liquid ammonia (-33°C) treatment improves light fastness properties of dyed jute fabrics for the diversification of jute for value addition.