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Colors for Earth

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“G Series”

The “G” series are glossy glass colors that are in a powder formula that is mixed with our GM300 Glass Color Medium.  By mixing with medium it will insure an opaque glossy finish.  Mix to a “white glue” or heavy cream consistency for opaque coverage. Two colors can be mixed together to achieve another color.

  • The 37 of the colors are lead-free (non-toxic).
  • Available in 1 oz. (25 grams), 2 oz.,4 oz. and Pint jars.
  • We have 2 colors in “GT” Series that are not food safe and should not be used on any food surface items.
  • They DO NOT have to be capped to have a glossy finish.
  • When the colors are thinned they can be brushed, sponged, sprayed/airbrushed, stippled or applied with a airpen, writer bottle or gizmo or used with a stencil.  When thinned with GM300 Glass Medium you retain the color.  When thinned with water you dilute the color.
  • When painting with the colors it is recommended to use a “drop & fill”, “pool and puddle” method with a liner brush and then push and pull into areas.
  • Two-color blend of colors are done by butting two colors next to each other and then pulling one color through the other, back and forth.
  • Marbleizing can be done by taking 1-3 colors and placing dots of each color in an area until it is filled and then on the top surface create a figure”8” or “S” with the brush to variegate the colors through each other.
  • Keep the colors mixed up as the color tends to settle to the bottom.
  • The colors can be used dry.  Example; Sifted/Sprinkled over the glass for different techniques.
  • Can be silk screened.
  • Firing is cone 014-017 or from 1376º to 1550º in a ceramic or a glass kiln, depending on the type of glass you are using. Our glass colors hold their color to a much higher temperature when used on ceramic or porcelain bisque.
  • Can be added to Flexi-Glass Medium to create sheets of flexible glass color.

BA Series”

  • BubbleART is a fired glass color that are non-toxic colors that are in a powder formula that is mixed with our GM300 Glass Medium.  Mix equal parts or can be used thinner.  Keep mixed up as the color tends to settle to the bottom.
  • These 16 colors are translucent/transparent colors that were designed to be fused between two layers of glass to create bubbles.
  • Available in 1 oz. (25 gram), 2 oz., 4 oz. and Pints.
  • These colors are design or artist dependent, meaning that where you put your design you can control the bubbles.  If you use a liner brush and place lines on the glass and leave spaces between them you will get lines of bubbles.  Solid areas will be all over bubbles.  You can place dots of color and these will be small collections of bubbles.
  • BubbleART can also be used on top of glass.  You will get a textured look and feel.  Some colors will be transparent and others will be opaque when used on top of glass.  Some of these effects are technique dependent.  You can add more GM300 Glass Medium to change the consistency and your application which can change the color intensity.  They are not food safe if applied on top surface.
  • Shake jar before mixing powdered colors with glass medium.  These colors are much more gritty than the “G” series glass color line.  The gritty stuff will create intense color, if you don’t want that you can pick it off the wet color before it dries.
  • The heavier the color is put on the darker it will be.  The thinner it is put on the lighter in color it will be.
  • When using float glass (window) you tend to get larger bubbles.  The float glass can be fired between 1425-1550 F.
  • When using 90 or 96 COE you will get smaller bubbles.  The 90/96 COE glass when fired to 1485 F tends to shrink in but the bubbles are a little larger than a firing of 1450 F.  96 COE glass fired to 1420-1450 F is a nice fuse.
  • The hotter these are fired the larger the bubbles are.  Each kiln is different and test should be done before starting a large project.
  • You can brush on GM-300 Glass Medium on bottom piece of glass and then with palette knife sprinkle on some of the dry powders.  Cap with clear or transparent glass and you will get individual bubbles where the colors are.  Fired to 1420-1450 F or Full fuse.

GS Series”

There are 4 colors of sparkle, GS-501 White Sparkle, GS-502 Copper Sparkle, GS-503 Gold Sparkle and GS-504 Silver Sparkle.

  • These colors can be used alone or added to any other “G” series glossy glass color.  Testing is recommended.
  • Available in 1 oz, 2 oz. and 4 oz. jars.
  • When added to other colors they are food safe.  Mixing ratio is equal parts.  The color will look like the sparkle color until fired and then it will be the color with flakes of sparkles throughout.
  • When used alone and mixed with glass medium they are a rough(matt) surface and not recommended for food surfaces.  The hotter they are fired they can smooth out.  It is recommended that you use these on the top surface of the glass.
  • When capped you will lose the metallic finish.
  • If fired first and then capped you will retail the metallic look.  Testing is recommended.
  • Keep mixed up as the color tends to settle to the bottom.
  • Can be added to Flexi-Glass Medium to create sheets of flexible glass color.

GZ Series”

There are 5 colors of Glitz, GZ-601 Opal Ice Glitz, GZ-602 Copper Glitz, GZ-603 Gold Glitz, GZ-604 Pearl Glitz and GZ-605 Burnished Gold Glitz.  They can be used on glass or ceramic surfaces.

  • These colors can be used alone or added to any other “G” series glass enamels.  Testing is recommended.
  • Available in 1/2 oz. jars.
  • Non-Toxic.
  • Can be used on top of glass or between.
  • They are not meant for a overall coverage but as a added highlight/Glitz or a accent to your design.
  • When capped you will dimension the metallic finish slightly.
  • Shake well until it releases from the bottom of the jar.  Then, stir well to make sure that they are completely mixed.  Keep mixed up while working as the metallic’s will fall to the bottom of jar.
  • After firing, wash/brush off any burn off residue on the surface.
  • NOT recommended to apply color on top of Glitz.  This could cause the color to repel or pull back.  Testing is recommended.
  • These can be used on top of ceramic glazed surfaces as a third fire accent also.

GT Series”
These colors are leaded and not recommended for food surfaces.

  • Kiln needs to be well vented up to 900-1100 degrees.
  • If using a kiln that has had other things in it besides glass, such as copper based glazes and materials it could affect the out come of the colors.  They may turn grey or smoky looking.
  • Apply even coverage.
  • Allow to dry before firing.

What types of glass can I use with “G”, “BA”, “GS” “GO” and “GT’s” Series colors?
The colors can be used on most types of glass including:

  • COE 90
  • COE 96
  • Float (window) glass.
  • They also can be used as an overglaze on glazed ceramic pieces.  When planning to use with fired ceramic glaze surface, testing is recommended.


  • If color is chalky or dull then it is probably under fired.
  • If color crawls or pulls away from outline then it is probably too heavy.
  • Some glass cleaners or not enough ventilation, will leave a residue on glass that can cause colors to be  grey.

Product Description

14 colors come in this kit that was chosen, from our 38 colors available in our ceramic underglaze line, to enhance your glass enamel work.

  • Do not use directly on glass.
  • Dilute with water when using.
  • If applied heavy it will be a matt finish and can be rough to the touch.
  • Fine clear powdered frit can be sifted over to ensure a smooth finish.


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