This is a non exhaustive selection of some manufacturers websites you may find useful:
Artoz Papier AGMakers of high quality card and paper stationery.
Copic MarkersThe COPIC Marker System consists of alcohol based fast drying, non-toxic markers which come in more than 214 colors, are refillable, have replaceable nibs and are toner compatible.
Daler-RowneyDaler-Rowney’s reputation as a manufacturer of the Finest Art Materials dates back more than 200 years. The Daler-Rowney name has become synonymous with consistent quality to artists throughout the world.
Faber-CastellFaber-Castell was founded more than 240 years ago in Germany as a pencil manufacturer. Today Faber-Castell is world renowned for its high quality, professional art supplies and its fine writing instruments and accessories.
Golden Artist ColoursManufacturers of high quality acrylic paints and mediums.
LinexLinex A/S is one of the leading manufacturers of drawing articles with sales to more than 50 countries.
Liquitex AcrylicsLiquitex was the first water-based acrylic paint invented. The Liquitex mission is to provide artists with the highest quality acrylic paints and associated products.
PentelPentel has been producing some of the world’s favourite writing instruments for over half a century.
PRAT ParisFor 25 years, Prat Paris has been a worldwide leading manufacturer of professional quality presentation materials and has been able to offer the finest and broadest selection.
Technical Sales LondonTechnical Sales Ltd was founded in 1948 to supply drawing and art materials to the retail, trade and education markets.
Winsor and NewtonFounded in 1832, Winsor and Newton is the world's leading brand of fine art materials and has developed an unrivalled reputation for quality, reliability and product innovation.