Seven parts washed grit sand to one part cement. The grit gives it it's strength. If you use building/plastering sand it will crack.
why yes it Actually is
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Shanghai plastering means that the walls are coated with a very shiny acrylic paint. Shanghai plaster is a way to seal walls from water damage and is very beautiful.
7% is allowable limit for plastering purpose but limit is extented to 10% for masonary works.As the availability of natural sand has become a problem,particularly in big cities.
Plastering sand is find sand screened to suit the plaster coarse i.e. base coat or finish coat. For finish coat very fine sand is used. Sand for concrete is not sived if pebles are not present. Both sand shall be sweet sand, if from sea it has to be washed before use.
Rendering is the term used for covering stone or brick etc. plastering is the term used for the application of the material. These days anything external is referred to as rendering and anything inside is plastering. If someone was to use the term rendering for internal works, I would assume they meant solid plastering as opposed to dry-walling with plasterboard." or The term "Rendering" is used to describe the application of a coat - usually sand or cement, internally or externally, alternative mixes - i.e. sand lime can be used. "Spray rendering" is another method used for exteriors. "Plastering" is the term used to describe the application of a wide range of materials to walls and ceilings."
Plastering
The type of sand is also important. The right ratio for a mixture of cement and sand is 1:5 to 1:6
100
The duration of Walls of Sand is 1.92 hours.