Spectrum Cone 06 - 5 Majolica / Ultraglaze Colors (301 - 370): A highly versatile product that can be used as a majolica color on top of a white base glaze or as an underglaze color underneath a clear glaze or as a glaze on its own. •For majolica technique first apply two or three coats (depends on how heavily you apply each coat) of a base white glaze (i.e. 799 Majolica White for cone 06/04 firings or 1118 White for cone 4/6 firings) all over the piece. After it has thoroughly dried you can decorate with the 300 series colors. One coat will give you the traditional majolica look in which some of the base white shows through the color. •For opaque coverage two coats of color will be required. •For use as an underglaze use the 300 series as you would with Spectrum 500 Series Underglazes (i.e. one coat - semi-transparent, two coats - semi-opaque, three coats - opaque) and then cover the entire piece with clear glaze (i.e. 700 Clear for cone 06/04 firings or 1100 Transparent for cone 4/6 firings). The 300 series Majolica Colors can also be used as a glaze on its own, over the whole range from cone 06 to cone 6. It will fully vitrify at cone 06 but the surface will not be quite as shiny as Spectrum 700 Series Glazes. At cone 6 most of the colors will show little color change, except the pinks and purples that are not quite as temperature stable. All of the majolica/ultraglaze colors are lead-free, dinnerware safe and A/P non-toxic.
 

Spectrum Cone 06 - 6 Underglazes (501 - 570): A full palette of rich, vibrant colors that are opaque with three coats, semi-opaque with two coats and semi-transparent with one coat. They are compatible for use under most clear glazes. We suggest that you try them with one of Spectrum's clear glazes (700 Clear cone 06/04, 250 Satin Clear cone 06/04, 1100 Transparent cone 4/6, 1120 Satin Clear cone 4/6 or 1200 Transparent cone 9/10). Unlike many other brands of underglaze Spectrum uses a frit base rather than a slip (clay) base for the 500 series underglazes. The advantages to the user are that these underglazes can be applied on greenware or bisque and they can be used with or without a clear glaze covering. When used without a clear glaze cover they have a matte velvet like surface. However, when used without a clear glaze cover they are not considered dinnerware safe because the rough surface can be difficult to clean and can encourage bacteria growth. The color chart below shows the unglazed color in the upper left half of the tile and the color when covered by a clear gloss glaze in the lower right half of the tile. The color chart samples were fired at cone 05. The 500 series underglazes generally have good temperature stability up to cone 6 and for many colors to cone 10. When fired hotter than cone 04 you may get small color variations from those shown on our charts, so please test them for your application. Our underglazes can be intermixed to create your own colors. However, Spectrum recommends not mixing 561, 562, 563 with any of the other colors. These colors are based on cadmium encapsulated stains that do not mix well with other ceramic stain colors. All of the underglaze colors are lead-free, dinnerware safe and A/P non-toxic
 

Spectrum Cone 06 - 6 One-Stroke Underglazes (600 - 640): 600 Series One-Strokes (concentrated underglazes) are intended as the name implies, to give opaque coverage with one brush stroke. They are ideal for painting on designs and can be used in the same manner as underglazes. They are very similar in use to Spectrum 500 Series Underglazes. However, they have approximately twice the concentration of color as the underglazes and are generally of a thicker consistency. All one-stroke colors are lead-free, dinnerware safe and A/P non-toxic. •Can apply a clear or transparent glaze. •Can thin with a small amount of water if necessary. •Can be intermixed with other colors in the same series
 

Spectrum Cone 06 - 6 Raised Accent Colors (Glaze Pens) (RAC 0 - RAC 16): These are slip based colors (or engobes) which are available in 2 oz. applicator pens with a fine metal tip for decorating on greenware or bisque. They create embossed or raised designs on ceramic decorative work because the colors do not flatten out when they are fired. One pint refills are available. All Raised Accent Colors are lead-free, dinnerware safe and A/P non-toxic. Note: Pint refills are a special order. Please allow 4 weeks for shipping in that siz
 

Spectrum Cone 06/04 Opaque Gloss Glazes (700 - 799): A wide range of lead free, dinnerware safe, A/P non-toxic colors, including excellent bright primary colors. These glazes require three coats by brushing for opaque coverage. In general, a more even appearance can be achieved by alternating the direction of brush strokes by 90° to the previous coat (i.e. first brush up and down the piece, next coat brush side to side). These glazes do not bleed together very much so they can usually be butted against each other without the colors running.
 

Spectrum Cone 06/04 Semi-Transparent Gloss Glazes (802 - 816): These lead free, dinnerware safe, A/P non-toxic glazes can be used to produce a multi-tone appearance since the color gets darker where they are thicker, such as in places where they flow into the details on pieces. Generally, it is best to apply them thinly (i.e. two coats by brushing
 

Spectrum Cone 06/04 Satin Glazes (250 - 258): These cone 06/04 glazes provide solid coverage and a beautiful satin finish. They require three coats by brushing. Satin glazes tend to be stiffer and do not move much in firing, so an even application is glossier the surface will become. They are all lead-free, dinnerware safe and A/P non-toxic
 

Spectrum Cone 06/04 Crackle Glazes (138 - 170): Although these glazes are lead-free and non-toxic, they are not dinnerware safe because of the possibility of bacteria growth in the cracks. After they have been fired to cone 06/04 and allowed to cool you can rub ink or dye into the cracks, in order to make the crackle pattern stand out.
 

Spectrum Cone 06/04 Low Stone Glazes (900 - 925): Spectrum's exciting new line of low fire (cone 06/04) glazes give the appearance of stoneware. Low Stone Glazes approximate the look of high-fired reduction pottery, yet they are fired at low temperatures in an electric kiln. The glazed bells on the right illustrate how Low Stone Glazes react with each other when they overlap. •The first nine colors have a glossy finish: ◦901 to 905 are semi-transparent two-tone glazes that produce a beautiful effect when used on pieces with some detail. ◦906 to 908 are glazes that break up and give one color in areas where they are thick and another color in areas where they are thinner. •909-924 have a satiny finish and they will all break up to varying degrees. Spectrum has added 900 Clear to this line which can be used, for example, to line the inside of pots. Please do not use Spectrum 900 Series Glazes on the same piece with Spectrum 700 Series Glazes. Due to significantly different expansion rates this combination can cause pots to crack
 

Spectrum Raku Glazes (850 - 873): Spectrum Raku Glazes were developed for firing in either electric or gas kilns. Click here or scroll down to see the firing process for these glazes. •One of the Raku glazes is not lead-free (Raku Orange 869 contains lead and cadmium). •Four of the Raku glazes are lead-free and non-toxic (850, 851, 854, and 856). •All of the rest are lead-free, but are over the threshold limit for copper and are therefore not non-toxic in the liquid state. Spectrum Raku Glazes are set up for brushing application. They can also be poured or dipped on pieces, although they should probably be thinned with a little water for this type of application. Due to the many variables involved in Raku firing, particularly during the reduction phase, our chip charts and printed color charts should be used only as approximate guidelines. Your results may vary greatly.
 

Spectrum Cone 4/6 Stoneware Glazes (1100 - 1196): We offer a large selection of Spectrum Cone 4/6 Stoneware Glazes. All of these glazes, except 1187 Clear Crackle, are lead-free and dinnerware safe. Most of them also come with the A/P non-toxic rating from the Art & Creative Materials Institute (ACMI) which is clearly marked on the product label. Some of the reactive type glazes are rated C/L by the ACMI which means that they are considered toxic in the liquid (unfired) state due to the presence of heavy metals, such as copper, beyond the non-toxic legal limit. C/L rated glazes are not suitable for use by young children or pregnant women. Spectrum has three types of stoneware glazes: clear glazes, plain colored glazes, and reactive glazes. In general, clear glazes are used to cover designs created with underglazes. There is a choice of gloss, satin or crackle finishes. Plain colored glazes are opaque and come in gloss and satin finishes. Some of the most popular stoneware glazes are the reactive colors which produce multi-tone and multi-colored effects by the combination of various metal oxides. Many other interesting effects can be created by layering these reactive glazes. In particular, layering a more fluid glaze, such as 1173 Texture Hot Chowder, underneath or on top of one of the other reactive glazes often produces beautiful results.
 

Spectrum Cone 4/6 Nova Stoneware Dipping Glazes (1500 - 1541): Spectrum Cone 4/6 Nova Stoneware Dipping Glazes are designed to fit cone 4/6 stoneware and porcelain clay bodies. Nova Dipping Glazes are available as 1 gallon of liquid glaze or as 7.5 lbs of dry glaze. Before dipping, mix glaze thoroughly. Bisque fire to Cone 04, then glaze and fire to recommended firing temperature at Cone 5. Thin with water if necessary
 

Spectrum Cone 9/10 Hi Fire Glazes (1200 - 1272): We offer a large selection of Spectrum Cone 9/10 Hi Fire Glazes. All of these glazes, except 1201 Satin Crackle, are lead-free and dinnerware safe. Most of them also come with the A/P non-toxic rating from the Art & Creative Materials Institute (ACMI) which is clearly marked on the product label. Some of the reactive type glazes are rated C/L by the ACMI which means that they are considered toxic in the liquid (unfired) state due to the presence of heavy metals, such as copper, beyond the non-toxic legal limit. C/L rated glazes are not suitable for use by young children or pregnant women. Spectrum has three types of hi fire glazes: clear glazes, plain colored glazes, and reactive glazes. In general, clear glazes are used to cover designs created with underglazes. There is a choice of gloss, satin or crackle finishes. Plain colored glazes are opaque and come in gloss and satin finishes. Some of the most popular hi fire glazes are the reactive colors which produce multi-tone and multi-colored effects by the combination of various metal oxides.
 

Spectrum Glaze Crystals (CR01 - CR12): Spectrum Glaze Crystals are all lead-free and dinnerware safe when fired to a minimum cone 06. These crystals are very versatile and can be used successfully from cone 06 to cone 6. They can be used with any glaze in this firing range to produce a great variety of different appearances. They can also be intermixed. Many beautiful combinations of two or more colored crystals on your choice of glaze background can be used. Please be aware that, due to varying expansion coefficients, some of these crystals may cause crazing on some glazes, particularly at stoneware temperatures. Please test for suitability in your application.