| You are technically helpless in some ways
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| | his decorating kiln temperature. This may
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| when it comes to gelding. You are at the
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| | cause blistering of the gold or other
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| mercy of your gold supplier. Preparations
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| | problems. The gold emulsion supplier can
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| of gold emulsions used in ceramic
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| | make the emulsion more suitable for
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| decorating are prepared in secret. Any
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| | higher firing.So the problem is glaze
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| technical problems relating to the
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| | control.Why do you have variation in the
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| emulsions used must be resolved by the
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| | hardness of the glaze?Remember that we
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| gold vender. Also, the emulsion suppliers
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| | are talking about fusibility here.Most
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| often adjust emulsions to resolve
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| | fine china glazes are lead based. Lead
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| problems not caused by regularly used
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| | bisilicate is a lead frit commonly used.
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| emulsion formulations.Gold and other
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| | It is make in large batches and the
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| precious metal emulsions are used in the
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| | specific gravity of each batch is
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| ceramic industry to add value to a
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| | different. Therefore the laboratory at
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| product. This is usually in the form of
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| | the factory must calculate the lead
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| banding or hand painting. Banding can be
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| | content of a glaze made with a particular
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| by hand or by machine. On firing, the
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| | frit batch. If the lead content is too
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| gold must sink to the proper extent. It
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| | high, then the lead bisilicate must be
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| is called soft if it easily abrades off
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| | cut back. If the calculated lead content
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| with a pencil eraser. If it sinks too far
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| | is too low, it must be increased.The best
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| into the glaze and looses its ability to
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| | control for the glaze itself is the FIRED
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| be buffed to a fine polish, it is called
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| | specific gravity. Fire a cup of glaze,
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| hard.Hard gold can be caused by soft
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| | break out a chunk, and measure the
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| glaze. That is the glaze is more fusible
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| | specific gravity. Use this as a control
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| than usual. The decorating supervisor
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| | procedure.To maintain better control,
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| tells the lab that the glaze is soft,
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| | blend frit batches before glaze
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| lowers his decorating kiln temperature,
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| | formulation to even out the composition.
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| and hopes the next lot of glazed ware
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| | Work with your suppliers to standardize
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| will not cause him more problems.Soft
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| | their materials. Blend glaze batches to
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| gold from hard glaze causes him to raise
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| | get the right glaze hardness.
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