Spectrum Brush-On Glazes (Cone 4-6)

October 2024 Update: Due to unprecedented global demand, Spectrum Glazes is having difficulty fulfilling distributors' orders. They are working on putting measures in place to increase production and storage capacity, which could take 4-6 months. Thanks for your patience and understanding.

Spectrum’s Cone 4–6 range offers an impressive variety of colours and textures, making it easy to find the perfect glaze for any ceramic project. From bold hues like Bright Orange, Purple, Neon Orange and Fire Engine Red, to nature-inspired shades like Forest Green, Olive Stone and Pebble Stone, the glazes provide exceptional depth and consistency. Texture glazes, such as Txt Autumn, Txt Chocolate, Txt Moonscape and Txt Leopard, offer rich visual interest with reactive surfaces, mottling and floating patterns influenced by glaze chemistry and oxide behaviour.

Spectrum glazes layer beautifully, allowing for the creation of complex, floating effects by combining gloss, reactive, or satin glazes. Classic colours like Antique Mottle and Crimson offer reliable coverage. These brush-on glazes are formulated to stir easily, apply smoothly, and fire evenly in both electric and gas oxidation kilns.

Brush-on glazes, like Spectrum, simplify the glazing process for potters at all levels. Their smooth consistency allows even application on bisque-fired ware with standard soft-bristle brushes, making them ideal for mugs, tiles, bowls, and sculptural ceramics. Three coats typically provide full opacity, though some reactive glazes create their best effects when layered or varied in thickness. Spectrum glazes are ready-to-use, eliminating the need for mixing or sieving, making them perfect for small studios, community facilities, and home potters.

Designed for cone 4–6 firing, Spectrum glazes offer reliable results at mid-range temperatures while still producing expressive surfaces similar to high-fire and reduction glazes. Whether you’re creating samples, test tiles, or fully finished pieces, Spectrum glazes enhance your workflow with dependable coverage and rich ceramic colour.

These lead-free glazes (except where noted) are suitable for dinnerware, making them ideal for mugs, bowls, and tableware. Explore our full Spectrum glaze selection above. For more information on Spectrum products and instructions for use, please visit the Spectrum website.

At Potclays, we supply an extensive range of glazes, clays and tools and accessories - as well as much more - to potters of all skill levels. As one of the UK's leading ceramic suppliers, we offer dependable stock levels and expert guidance to help hobbyists, educators and professionals with their projects. Whether you’re experimenting with new textures, replenishing your glaze shelf or sourcing materials for large studio batches, Potclays provides everything you need.

Need help finding the right glaze for your needs? Get in touch with us, we're happy to help.