The selection of materials for large ornamental fish tanks in the aquarium is very important

　　 During the construction of the aquarium design and construction project, the material selection requirements for large ornamental fish tanks are very high, and the acrylic material is required to be cast in one time instead of extruded plates.Both the cast board and the extruded board belong to a kind of acrylic product materials, and their materials can be in other colors (white, black, red, apple green, etc.) which are more commonly used. Their transparency is very good, which is comparable to crystal, but the differences are as follows:

　　 1. The transparency of the cast plate is above 98%, while the extruded plate is only above 92%.
       2.There are no pits on the edge of the casting board, and the edge is very transparent; while the edge of the extruded board will have pits, and the edge of the B grade board of the extruded board can be seen yellow and black, and the edge of the A grade board of the extruded board is more like a black feeling.

　　3. The tolerance of the cast plate increases with the increase of its requested thickness (see What is the tolerance of acrylic sheet), and the tolerance of the extruded plate can be controlled within ±0.1mm
　　4. The pouring plate will choose 1.83M*1.22M and 2.44M*1.22M, and the length and width of the pouring plate can be selected arbitrarily (but not too wide, which will cause deformation and increase tolerance)

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