Art Spectrum - Colorfix Primer - 250ml - Soft Umber - Art Spectrum Colourfix Primer is a fine tooth, quick drying acrylic primer which bonds aggressively to practically any clean, dry surface - all types of papers (300 gsm or heavier recommended), canvas, card, ply, plastic, glass, timber, ceramic and metal. Art Spectrum Colourfix Primer can be applied with brushes, sponges, rollers etc. straight from the pot. Twenty colours are available, including Natural (Clear). All colours can be intermixed. The Clear Colourfix Primer allows the natural surface or underlying colours to remain visible, whilst providing extra tooth for more overlays. All colours are available in 250 ml jars, and Black, White and Clear are also available in a 1 Liter jar. All are lightfast.