Many cellulose companies use a blend of ammonium sulfate and borate. The most common compositions are based on lead borates (leaded borate glass or borosilicate glass). Yet other methods are reacting tributyl borate with trimethylaluminium chloride, or potassium tetrafluoroborate with trimethylaluminium. Potassium borate (borax) may have been used to protect against woodworm. Barium borate shows synergistic performance with zinc borate. Barium borate is resistant to ultraviolet radiation. Current methods involve reduction of trimethyl borate with sodium hydride. Quantum linked photons are producible with beta barium borate. Boron has a strong affinity for oxygen and a duly extensive borate chemistry. Barium borate is a bactericide and fungicide. Alcohols behave analogously giving the borate esters, e.g. trimethyl borate. In the high oxygen environment of Earth, boron is always found fully oxidized to borate. Zinc borate is used as a flame retardant. Sodium terbium borate is used in solid state devices. Such glasses are superior in performance to concrete and to other barium borate glasses.