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Duncan Overglazes

   Duncan Overglazes are lusters and metallic overglazes designed for decorative accents over a fired glazed surface.

    Duncan's Mother-of-Pearl is a translucent luster that provides iridescence to the glazed surface.  Try the Duncan Mother of Pearl over any overglaze compatible colored glaze, even black, for additional interesting effects.  Duncan's Mother-of-Pearl (MOP) is packaged in ½ ounce bottles, one bottle should be sufficient to cover 12 or so 12" tall vases or other art objects. 

    Duncan's metallic overglazes are Bright Gold, White Gold and Premium Gold.  Collectively these three metallic overglazes are commonly called Duncan Fired Gold overglazes.  White Gold, also known as platinum or silver metallic overglaze, is nearly the color of fine white gold jewelry.  Premium Gold has a higher gold content than Bright Gold and the color is slightly deeper and richer.  Bright Gold has the appearance of fine 18 karat gold jewelry.  Metallic overglazes are nearly opaque, and should be used over clear glazed surfaces, or lightly colored overglaze compatible glazed surfaces for best results.
 

Duncan's metallic overglazes are packed in a 2 gram vials.

The vial is shown nearly to scale at 100 pixels tall. One 2 gram vial is nearly enough Fired Gold to completely cover a 12" tall vase or similar art object.

    Duncan Overglazes have a caution warning label on every product on this page due to the presence of heavy metals or organic solvents in each product.  Children and women who are pregnant or may become pregnant should never use these products.  The odors from these products can be especially noxious during product application and firing.  Refer to the MSDS on the Duncan website for additional information.  

Vase Decorated with Fired Bright Gold
Overglaze Product Usage Information

						2 gram		½ oz
Caution Label		OG	901	Essence				6.00
Caution Label		OG	801	Bright Gold		16.00
Caution Label		OG	802	White Gold		16.00
Caution Label		OG	805	Premium Gold		25.00
Caution Label		OG	803	Mother-of-Pearl				6.00

    Products listed and prices are valid until December 31, 2008.  Duncan strives to keep a stable product line, however, color products may be discontinued, or prices changed without notice.

Overglaze Information

    Overglazes can only be applied to glazes that are marked overglaze compatible.  Some colored glazes are not compatible for usage with Overglazes and will be appropriately labeled.  The ware (and glaze) needs to be fired prior to the application of the Overglazes.

    The following information is courtesy of Duncan Enterprises:

Learning About Mother of Pearl

Basic Instructions
1. Be sure that the surface of your piece is free of dust, skin oils and lotions to ensure proper adhesion. Wipe surfaces with rubbing alcohol prior to applying the overglaze (except when used over crackle glazes.).
2. Always apply with a brush that is designated solely for use with Mother of Pearl to prevent contamination.
3. Do not stir or shake glaze.
4. Place a small amount of overglaze on a glazed palette.
5. For a swirled look, swirl on 1 coat, overlapping strokes.
6. For a smooth look, brush on all strokes in the same direction.
7. Correct application should produce a light blue tint.
8. Clean brush in Essence and let dry.
9. Overglazed ware can be fired while it is still wet. The kiln must be clean, well-ventilated (do not overload) and follow a normal firing schedule. Do not touch wet decoration and handle as little as possible until ware is fired to avoid smudging.
10. Stilt and fire Mother of Pearl to shelf cone 020.
 

Tips & Techniques
1. The appearance of Mother of Pearl will vary with the type of glaze over which it is applied. When applied over a gloss glaze, Mother of Pearl will add a shiny luster. When applied over a matte glaze, Mother of Pearl will add a dull luster.
2. If Mother of Pearl is accidentally applied on the wrong area, dip a cotton swab in Essence and wipe off misplaced color.
3. If any areas are missed, go back and touch up before Mother of Pearl dries.
4. If using a metallic overglaze and Mother of Pearl on the same piece, apply and fire the metallic overglaze first.
 

Health & Safety
1. Overglazes contain solvents and should be used in a well-ventilated area. Those susceptible to odors (such as pregnant women) should be especially careful to work only in areas with an adequate ventilation system. During firing, odors are not dangerous but can be offensive. These odors quickly leave the area; however, you should not work in the kiln area during firing.
2. Duncan Overglazes can be used on surfaces that come into contact with food and drink. Care must be taken to avoid hard scrubbing when washing overglazed ware, because of the possibility of scraping off the thin layer of metal or luster. Treat your overglazed pieces as you would fine china. Although overglazed ware will take repeated washings in a dishwasher, the overglaze will eventually wear away.

Learning About Bright Gold, White Gold and Premium Gold

Basic Instructions
1. Be sure that the surface of your piece is free of dust, skin oils and lotions to ensure proper adhesion. Wipe surfaces with rubbing alcohol prior to applying the overglaze (except when used over crackle glazes.).
2. Always apply with a brush that is designated solely for use with Bright Gold to prevent contamination.
3. Do not stir or shake glaze.
4. Place a small amount of overglaze on a glazed palette. Apply one smooth coat. Do not let Bright Gold pool in an area; brush it out smoothly.
5. Correct application should produce a flag red tint.
6. Stilt and fire Bright Gold to shelf cone 019-018.
7. Clean brush in Essence and let dry.
8. Overglazed ware can be fired while it is still wet.  The kiln must be clean, well-ventilated (do not overload) and follow a normal firing schedule. Do not touch wet decoration and handle as little as possible until ware is fired to avoid smudging.
 

Tips & Techniques
1. The appearance of Bright Gold will vary with the type of glaze over which it is applied. When applied over a gloss glaze, Bright Gold will be shiny. When applied over a matte glaze, Bright Gold will be dull.
2.  If Bright Gold is accidentally applied on the wrong area, dip a cotton swab in Essence and wipe off misplaced color.
3.  If any areas are missed, go back and touch up before Bright Gold dries.
4. If using a metallic overglaze and Mother of Pearl on the same piece, apply and fire the metallic overglaze first.
5. For solid coverage with Bright Gold, apply over a yellow glaze or a yellow underglaze covered by clear glaze.
 

Health & Safety
1. Overglazes contain solvents and should be used in a well-ventilated area. Those susceptible to odors (such as pregnant women) should be especially careful to work only in areas with an adequate ventilation system. During firing, odors are not dangerous but can be offensive. These odors quickly leave the area; however, you should not work in the kiln area during firing.
2. Duncan Overglazes can be used on surfaces that come into contact with food and drink. Care must be taken to avoid hard scrubbing when washing overglazed ware, because of the possibility of scraping off the thin layer of metal or luster. Treat your overglazed pieces as you would fine china. Although overglazed ware will take repeated washings in a dishwasher, the overglaze will eventually wear away.
3. Caution. Do not place pieces with metallic overglazes into a microwave oven. As with any metallic surface, they could cause sparks.