Bone porcelain glaze defects under 4

Bone China pigment 320 ml per 500 grams with coupling agent, in the glass with the palette knife research rub evenly add 25 ml glycerin to continue research rub evenly. Because of copperplate paper gravure printed paper flowers YanLiaoCeng thickness, difficult to regulation, and there is no point to print out line occulting stereo feeling. So more water, trial lithographic and jet printing technology in recent years, to be able to print out with high light and shade, like painting as stereo effect, enhances the artistic appeal of blue and white porcelain. Bone China blue and white paper to the technical requirement of the printing carrier, from the artistic quality of improve color paper frame shall be made in plastic film, the current like decals poison membrane with PVC butyral, because it is easy to be dissolved by ethanol. 3, bone China light meaning: also known as bone porcelain light or bone porcelain flower surface suffused with light. Symptoms are: bone porcelain, bone China water light, bone porcelain color not clear white or pale color is expected to disappear. Defects belong to color deviation produced in bone China, bone China, bone porcelain color paper printing, bone porcelain painting billet, bone China printing and firing process. The reason: 1) Blue and white material composition of the pigment pigment preparation, weak hair color or coloring agent CO content is too little, with pale blue after firing. ( 2) Under the system of bone porcelain glaze decal with blue and white material used in hand-painted bone China is material color light. ( 3) Bone porcelain glaze in the printing material under seepage much sugar, printed pattern after burn osteogenesis porcelain products also make light. Material printed pattern will be the color coating unevenness of pigment uneven surface rendering generally pale. ( 4) Mix water, thin color scale reduce, make the light. ( 5) Sintering temperature is too high to overcome: ( 1) All drawn by hand bone China porcelain material, must try according to design or sample effect for use as a pigment according to the child in a standard kiln roasting is still light and temperature conditions, should improve pigment formula, choose excellent stain, increase Co0 reduce flux ( Bone porcelain glaze) Component, the material color after burning effect is deep blue color. ( Refer to the chapter & other; Bone China pigment mutant & throughout; ) ( 2) Under the bone porcelain glaze colors printing material modulation, cementing agent should not put much sugar, in case of light material. Color coating even in case of flower materials or light material. Water, improve water concentration, according to the material quality, and the effect of hair color, select the appropriate kiln, prevent flood light because of the sintering temperature is too high. Article 4, and bone China break the meaning: hand-painted bone China porcelain patterns, discontinuous line is not even. Classified line drawing defects, produced in the bone porcelain painting billet, coupling process. The reason: 1) Bone China porcelain material particle is too thick, don't open lines, seasoning not divide evenly, easy to precipitation, water separation material ( Make) Or plate with die material ( Which is dry solid material) , to the pen, start line is hard to break. ( 2) Describe patterns contour, with glycerin or glue is too much, seasoning not divide evenly, make the bone porcelain billet surface not or less absorption of absorb water, pen just slip on the blank, not to feed line thickness, looked black, after firing, glycerin or glue too much convenient to interrupt line. Or because the calligraphy penetration, no line with bone porcelain, billet surface water line was interrupted by running water. — Tangshan bone China mugs suits to be continued. 。 。 。 。 。