Meet the ROHS standard PCB board which?
Pmma is in line with the ROSH standard but you are not used
Halogen, refers to the halogen elements of the periodic table of chemical elements, including fluorine (F), chlorine (Cl), bromine (Br), iodine (I). PCB board substrate chlorine and bromine are not more than 900PPM, bromine + chlorine does not exceed 1500PPM, is halogen-free sheet
