3/23/2023 0 Comments Porthole on cruise shipThe glass is put in a metal cover or steel frame with a shaft or screw to keep it firm. Brass portholes and bronze remain effective for a longer time. Materials such as brass and bronze are preferred over iron and steel because iron rusts because of seawater, and steel bends after a certain period. This process is called tempering, providing the glass does not break or shatter. Then this mixture is laid on top of a melting tin, ensuring that the proper shape of the glass is achieved. The process further involves constantly re-heating the mixture in huge furnaces so that the glass reaches its appropriate thickness. To make the glass, a mixture of silica, lime and ash is mixed, heated and cooled until the right consistency of glass is achieved. Making glass is known as sand-casting silica sand is the primary material for this process. The glass used in the portholes is compulsorily made involving sand. The materials used for building ship portholes are stainless steel, aluminium, brass, bronze, and iron. However, later on, portholes came to be built on every room and cabin on the ship. This construction pattern immensely helped the people working in these areas to work continuously for long hours. This allowed light and fresh air to enter those parts. Representation Image – Photograph by Flavio MestrovichĪ porthole was initially constructed to be a window in those areas of the ship where airing was a significant problem. For this, the height of the portholes is strategically decided, and one end of the portholes is hinged. The portholes are designed so that when a ship cruises into the middle of the seas, one can get the best possible ocean view from the ship’s porthole. They have retained their circular form and are unique compared to windows in other means of transportation. Portholes have been a part of ships since the beginning. What are the materials used for making portholes?
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