» Eco-House Inc.    Catalogue of natural chemistry products including thinners, oils, varnishes, and paint.    http://www.eco-house.com/

» Kama Pigments    Producer of pigments and media for artistic use.    http://www.kamapigment.com/

» Kremer Pigments    Manufacturer of pigments and binders for fine art and conservation. Located in Germany.    http://www.kremer-pigmente.com

» RGH Artists' Oil Paints    Manufacturer of high grade artist oil paints and pigments.    http://www.rghartistoilpaints.com/

» Sinopia    Offers pigments, mediums, and raw materials. A printed catalog is also available.    http://www.sinopia.com

» Studio Products    Offers a range of raw materials including pigments, gums, oils, and balsams. Includes recipes and discussion board.    http://studioproducts.com/