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Sukaso offers a comprehensive palette of vivid and attractive pigments,
formulated for a wide spectrum of glaze types and processing
conditions for its customers.
Body
Decoration
For those customers requiring stains for colored bodies, engobes and relief work, Sukaso has a wide spectrum of stable, consistent
pigments, which are manufactured under strict processing
conditions, to meet the technological and application needs of the
market.
Colored Bodies &
Body Stains
Colored clays, either natural or colored by the presence
of ceramic body stains are used for figurines, tableware, tiles etc.
Here fine grinding of raw material is important if the color is to
be uniform.
Owing to the cost of ceramic colorants, it is usual to use only
small quantities (1 - 5%) when coloring a body throughout. Colorant
is mixed in the body by wet grinding. Very careful milling,
measuring and blending are necessary for best results. The firing
temperature will vary and depend on the composition of the body.
Colored bodies may be left unglazed, or covered with a colorless glaze. Interesting effects are also achieved by using a slightly
opacified white or light colored glaze.
Engobes
Colored or stained body material may be used to decorate the
surface of a piece. For e.g., thick ware may be made from a
body whose color is undesirable, and then covered with an engobe,
or body slip of higher and good color.
The composition of the engobe will be adjusted according to the
body it has to cover. It is prepared by fine grinding the colorant
with non- plastic material. It is applied on the body by dipping,
spraying or brushing.
Relief Work & Inlaying
Decoration methods like scratching, modeling and piercing is
possible on hard bodies to give special effects.
Glaze
Decoration
These user-friendly, environmentally safe colors have been
formulated for use as Onglaze, Inglaze or Underglaze Deco systems.
Their fluxing characteristics render them suitable for use on a
variety of substrate types, including Porcelain, Bone China,
Vitreous China, Stoneware and Earthenware. They are also capable
of being fired under both fast firing and conventional longer
firing cycles.
Underglaze
The ceramic agents are processed into the form of paint or ink
with filters, carriers, oils and the like, and can then be applied
to the ware by spraying , brushing, dusting, decals, stamping,
transfer or screen printing. The glaze is then applied over the
decoration and then fired to make the decoration permanent.
Onglaze
The coloring agents mixed with low melting glassy flux are applied
to ware that has already received its gloss firing and are fixed
to it by further firing at lower temperature. It can be applied in
all different ways followed for under glaze decoration.
Inglaze
The ware is glazed and when this is dry but not fired, the
decoration is hand painted on it. A characteristic soft effect is
produced.
Methods of application of the glaze colored designs
Due to the diversity of physical and chemical properties of
ceramic colorants together with variety of surfaces and shapes
they are used on, a very wide selection of methods of applying the
colored designs have come into use.
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Direct
application: Hand painting, spraying, banding and lining,
crayoning, ground laying.
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Semi-direct
application: The design is made in permanent form which is
used to apply the colorant to the ware by stamping,
stenciling, screen printing.
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Indirect
application: The design and colorant are produced on a thin
sheet of a paper from which it is transferred to the ware-
offset, paper transfers, engraving, lithography, screen
printing.
Note:
In every method of applying colored design, the
physical properties of individual colorant preparation play an
important part and will, in general, be different for every one.
Thus one will have more tendency to run, settle out, clog up, dust
off etc., than another. It is therefore, necessary to get the
right knack for every colorant. It is also very important to
derive the best sequence for applying a number of colorants to a
single piece as the final effect will differ with the order
followed.
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