TITLE

Photochromic Effect in Engobes Containing Titanium Frits as Opacifiers

AUTHOR(S)
Melchiades, F. G.; Santos, L. R.; Nastri, S.; Leite, Á. P.; Boschi, A. O.
PUB. DATE
March 2013
SOURCE
Interceram: International Ceramic Review;Mar2013, Vol. 62 Issue 1, p16
SOURCE TYPE
Trade Publication
DOC. TYPE
Article
ABSTRACT
Engobes are intermediate layers applied between the paste and the glaze on ceramic tiles for the main purpose of concealing the color of the ceramic support. For engobes to perform this function effectively, opacifiers -- often zirconite -- are used in their composition. However, the price of this raw material on the international market has fluctuated significantly in recent years, motivating the search for new opacifiers. To this end, frits containing large amounts of titanium have been developed as alternatives for the opacification of engobes. The purpose of this study was to verify the effectiveness of this option for engobe opacification, considering that the literature indicates the existence of an optical phenomenon called the photochromic effect associated with the presence of sphene crystals in ceramic glazes. Engobes containing titanium in the form of crystalline raw materials and frits were applied to ceramic tile supports and their color was characterized spectrophotometrically immediately after firing and after controlled periods of exposure to ultraviolet radiation. The results indicate that engobes containing titanium frits undergo significant changes in color after short periods of exposure to ultraviolet radiation.
ACCESSION #
86442204

 

Related Articles

  • On the Trail. Munn, Judi // Pottery Making Illustrated;Sep/Oct2008, Vol. 11 Issue 5, p37 

    The article presents information on slip trailing as decorating technique. Several types of trailers are cited including their suppliers. Slip is described including its difference with engobes and its different types. The benefit of using slip to simplify the glazing process is presented to get...

  • ENGOBES. Bates, Wayne // Ceramics Monthly;2007 Ceramic Arts Buyers Guide, Vol. 54, p26 

    The article offers information on engobes. Slips by composition tend to be primarily clay. Engobes tend to have less clay, and often include frits, extenders, gels, or whatever. For a slip or engobe, the most plastic and whitest clay is needed. Not all commercial stains will work, but if one...

  • LAYERED CONE 06 AND CONE 6 GLAZES. Wilson, Lana // Ceramics Monthly;2007 Ceramic Arts Buyers Guide, Vol. 54, p30 

    The article offers information on various kinds of layered Cone 06 and Cone 6 glazes. The manganese addition for Lana's Red Moss Glaze can be three percent for a light orange, six percent for a strong rich red and 10% for a darker red. A thinner application yields black. Lana's Purple Aqua Glaze...

  • Color and Texture with Engobes. Zamek, Jeff // Pottery Making Illustrated;Sep/Oct2006, Vol. 9 Issue 5, p10 

    The article deals with the use of engobes in pottery craft. They offer an alternative method of introducing color and texture to the ceramic surface. Engobes can be used to mask the color of the underlying clay body. They can also be used to introduce new color variations that can interact with...

  • word of the month.  // Ceramics Monthly;Jan2007, Vol. 55 Issue 1, p14 

    The article provides information on the term engobe. It refers to a family of related sliplike materials used as thin coatings on clay bodies for purposes of changing the surface color or texture. Some engobes are essentially clay slips of various colors. Other types contain little or no clay...

  • Colorful Engobes. Bates, Wayne // Pottery Making Illustrated;Jan/Feb2007, Vol. 10 Issue 1, p8 

    The article offers information on the use of engobes in sgraffito techniques. Frits, fillers, and retardants are added to the engobes. These frits, fillers, and retardants are dependent on the colorant used. A list of engobes mixed with Mason stains is provided. Several glaze recipes that can be...

  • Engobes for ceramic brick. Yatsenko, N. D.; Rat'kova, É. O. // Glass & Ceramics;Mar2009, Vol. 66 Issue 3/4, p93 

    Engobing is used to expand the color range for the facial surface of brick. Alight-colored engobe composition has been developed, using red-fire clays followed by the addition of various pigments, to regulate color. The rheological properties of the engobe slips are studied and the quantity of...

  • Pigments and Engobes for Crystalline Glazes. ROMA, CATERINA // Ceramic Review;Jan/Feb2014, Issue 265, p68 

    In a brief article, the author discusses a technique developed by the Spanish ceramist Josep Mariscal in which he uses pigments and engobes to create crystalline glazes. The author notes that via the use of this simple but challenging technique, Mariscal creates pottery pieces that feature...

  • Recipes.  // Ceramics Monthly;Apr2001, Vol. 49 Issue 4, p51 

    Presents several ceramics recipes. Materials; Color variations.

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics