Adding clay, borax or frit to the underglaze colorants helps.    From Wordnik.com.  [11. Glaze problems] Reference

Add clay, borax, soda ash or glaze to the underglaze colors.    From Wordnik.com.  [11. Glaze problems] Reference

Color pigment from engobe or underglaze melts into the glaze.    From Wordnik.com.  [11. Glaze problems] Reference

Composite body, underglaze painted on white slip, transparent glaze.    From Wordnik.com.  ['The Louvre and the Masterpiece'] Reference

Even more than underglaze, on-glaze decoration will tend to flow with the glaze.    From Wordnik.com.  [10. Decoration] Reference

It is necessary to use transparent glazes in combination with underglaze decoration.    From Wordnik.com.  [5. Simple glaze theory] Reference

When I was in Japan, I used to do cobalt underglaze on porcelain more than anything else.    From Wordnik.com.  [Kater’s Art » 2008 » December] Reference

The more fusible metallic oxides can be used directly as underglaze pigments, mixed thinly with water.    From Wordnik.com.  [10. Decoration] Reference

In addition, the high heat needed to form a good covering glaze limited underglaze colors to those that could withstand extreme temperatures.    From Wordnik.com.  [The Creation of Color in Eighteenth-Century Europe] Reference

A common decorative technique for clay bodies, associated especially with faience and similar soft-paste earthenwares was underglaze painting.    From Wordnik.com.  [The Creation of Color in Eighteenth-Century Europe] Reference

In the late Ming, decoration in overglaze enamels, often in combination with underglaze blue, was used to startling effect, especially in urban areas.    From Wordnik.com.  [2. China, 1522-1796] Reference

The basic pigment can now be used for mixing of underglaze, on-glaze or enamel colorants with additions of fluxes, clay, silica etc. as described below.    From Wordnik.com.  [12. Developing glazes] Reference

Look at that unctuous underglaze in the palest, almost imperceptible blue, not too glassy, not too dull, and fired with absolute evenness and consistency.    From Wordnik.com.  [Sir Percival David at the British Museum] Reference

The techniques of enameling on the biscuit, of composite monochrome glazing, of application of underglaze blue in powder form, and of decoration overglaze in transparent famille verte enamels were perfected.    From Wordnik.com.  [1796] Reference

More fluxes are added to maiolica colorants than to underglaze colorants and the lower the viscosity of the colors and the glaze is, the more the decoration will run and the contours of the decoration will be blurred.    From Wordnik.com.  [12. Developing glazes] Reference

This leaves the small tile producer with the possibility of other market niches, such as hand-decorated tile (relief, engobe, underglaze, overglaze) and especially unglazed floor and wall tile made from local red-firing clay.    From Wordnik.com.  [5. Semidry foaming] Reference

Materials: White cast dry slip, lead-free underglaze and clear glaze.    From Wordnik.com.  [Apartment Therapy Main] Reference

Tiles, fritware Luster-painted and underglaze painted from Kubadabad, 1220s.    From Wordnik.com.  [Recently Uploaded Slideshows] Reference

A few notable pieces of this early underglaze decoration from the museum may also be seen.    From Wordnik.com.  [Art and Handicraft in the Woman's Building of the World's Columbian Exposition, Chicago, 1893] Reference

Learn the casual approach in working with clay, underglaze decoration and patented soda firing technique.    From Wordnik.com.  [OnlineAthens: Top Headlines] Reference

'Successful firing of underglaze blue and red on one object required the highest level of technical mastery.    From Wordnik.com.  [Home | Mail Online] Reference

Aimee Mallory puts underglaze on a clay clock she made during a pottery class at the Huntington Museum of Art Monday night.    From Wordnik.com. Reference

Vase, left, thrown by James Anderson, underglaze decorated with woman and white cat design by Patricia Anderson Findeisen, 2004.    From Wordnik.com.  [SunHerald.com: Featured Story] Reference

Although most Delft Blue borrows from the tin-glaze tradition, it is nearly all decorated in underglaze blue on a white clay body.    From Wordnik.com.  [The Fergus Falls Daily Journal] Reference

On the underside, a Qianlong reign mark painted underglaze in square seal form indicates that the vase was made to be used in the palace.    From Wordnik.com.  [NYT > Home Page] Reference

This lent itself to underglaze decoration and became the china of choice for manufacturers who also used overglaze enamels for their designs.    From Wordnik.com.  [columbiatribune.com stories] Reference

The pieces representing this period are three small plates, showing the first success in this underglaze, and a large vase, white body, fishes, and water-plants.    From Wordnik.com.  [Art and Handicraft in the Woman's Building of the World's Columbian Exposition, Chicago, 1893] Reference

In the West, the term "Japanese Imari" has become the trade name of a Japanese ware with a decoration usually in underglaze blue with added red, gilt and occasionally green enamels.    From Wordnik.com.  [style court] Reference

I had some of Kurt Weiser’s cobalt underglaze that Bridget Harper my ceramics teacher and friend cadged for me.    From Wordnik.com.  [Kater’s Art » 2010 » July] Reference

I had some of Kurt Weiser’s cobalt underglaze that Bridget Harper (my ceramics teacher and friend) cadged for me.    From Wordnik.com.  [Kater’s Art » 2010 » July] Reference

Add clay, borax or frit to underglaze colors.    From Wordnik.com.  [11. Glaze problems] Reference

They underglaze, one subtle shade after another.    From Wordnik.com.  [Space]

1 1/2 x 8 x 1 1/2 inches Asian Art Museum/Kaz Tsuruta Covered jar with fish in a lotus pond Jiajing period (1522-1566); Jingdezhen, Jiangxi province Porcelain with underglaze cobalt and overglaze polychrome decoration.    From Wordnik.com.  [Art of the Ming Dynasty] Reference