All students of Std XII were taken to Industrial visit to Thoothukudi on 11.04.2025. At 10 a.m. we arrived at the Sasin Plaster of Paris. We first visited the salt unit. The salt unit was running on lease. Different people used to approach this salt unit to make their own brand of packets of salt. They used to sell it. The working hours for the workers in salt unit is 8 hours. 1 bundle contains 25 Kgs. They had a bundle of other element called Silica. It is used to absorb the moisture in salt. Many salt packets of different brands were there. Some of them were Sudha, Sunsea, Abarna, Annapoorna etc., We gained the knowledge. We went to Sasin Plaster of Paris. The Gypsum was converted into Plaster of Paris through a process called Calcination which involves heating Gypsum to a high temperature. Calcinations process involves heating, dehydration and powdering. Gypsum chemical formula is CaSO₄. 2 H₂O There are two methods of calcinations. They are Flash and Kiln Calcination. Plaster of Paris is used for various applications including construction, art and medical uses. At 4 p.m, we arrived at Nila Sea foods Pvt Ltd and Nila Cold Storage Pvt Ltd. We visited Fruits cold storage. The temperature was 3^o C to 5 ^o C. turmeric, Raisins, Dates, Fruits, Dal, Spices and Pulses were stored there. For Dal, Chilli, groundnut, yellow peas, cumin, tamarind, dry ginger, cinnamon, chenna and fenugreek, they maintained 5 ^oC to 8 ^oC. Next we visited the coldest storage area and the temperature was -22 ^o C. we can’t stay there more than a minute. We felt like we were in Antarctica. The items in that area is stored for more than 2 or 3 years without deterioration. The goods are stored using owner BIN card. It was an awesome experience in Nila Cold Storage. Next, we went to Venus water heater plant. There we saw how a metal water heater was made. First, the metal was cut and they rolled the steel sheets, next, they welded the rolled sheets in a tank form. Thy coated with glass and porcelain to avoid rust. Then they baked the tank in a furnace. They installed the heating element. Anode rod and insulation around the tank was added. Next, they covered it with outer metal shell. They installed pipes, valves and wiring. Finally, it was labeled, packed and shipped. We were wondered by seeing the process of making water heater. We enjoyed our industrial visit and have gained lot of knowledge.