Chemcast BR 1.250 sheets are 1.25" thick, transparent cell cast acrylic sheet which meets the UL752 Level 1 requirements.
The cell cast manufacturing technique produces sheets with unsurpassed optical clarity while maintaining a light transmission of 92%. Every sheet is inspected to ensure that the material meets exacting visual specifications. Thickness tolerances are checked on a sheet-by-sheet basis to ensure that the material will provide the required protection. The material is protected with masking to prevent surface scratches during shipping and manufacturing.
Underwriters Laboratories, UL 752, is the specification most commonly used to identify a material's level of bullet resistance. Chemcast sheets listed under UL 752 are rated for both indoor and outdoor applications.
Most fabrication techniques used for standard acrylic sheet will work with BR as the only difference between the two materials is the thickness of the sheet. It is essential to keep frictional heat to a minimum during fabrication to reduce internal stress. It is also necessary to prevent or remove any "notching" along the cut edge of the sheet. The presence of notches could reduce the material's resistance to cracking. Either scraping or bull nosing the edges before installation can eliminate notches. Cutting of the material can easily be accomplished with the use of a sturdy table saw. A saw blade having carbide tips and a "triple chip" tooth design achieves the best results. More intricate cuts can be made using a band saw or hand-held reciprocating saw.
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