We import raw materials (glass batch) from Australia and color from the US and New Zealand. Batch is primarily pure silica and fluxing agents such as borax or soda ash. Each batch maker has there own special recipe formulated specifically for the intended use. Colors are similarly specific to the use and makers formula. WE use Gaffer batch formulated in New Zealand and sold to us under there licensee from Australia. Currently we have in stock colors from Kugler, Reichenbach, Gaffer, and Ornela. Colors come in solid bars and an assortment of crushed frit sizes.