This line blend is exchanging KNO for CaO with Tile A with the most Calcium present and Tile B with the most KNO present.
B2O3 is present as is Alumina and Silica at constant levels. This set of tests have yielded some well melted and slightly fluid results.The colour has a definite pattern of being very strong greeny blue at Tile A and changing to an apple green at Tile B where the KNO becomes more dominant.Generally the tiles have remained shiny due to the Boric oxide adding glass to the matrix, and lowering the maturing temp.It may also have an influence
on colour in the background as it acts as a solvent and disperses colour
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