色・発色
color layering
Japanese: 色を重ねる
A technique for creating depth and color blends by layering transparent colors. The layered colors may sometimes interact with one another.
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Color layering is a technique and concept that creates new color effects by stacking multiple layers of colored glass. In transparent glass, the color of the layer beneath shines through, producing an additive or subtractive color-mixing effect. A wide variety of color expressions can be achieved depending on the number of layers, their order, and the transparency of each layer.
When planning color layering, please note that the appearance under transmitted light differs from that under reflected light. If you layer transparent blue over transparent red, it will appear purple under transmitted light, but the impression under reflected light will be different. We recommend testing with color sample tiles (color-sample-tile) beforehand to confirm the actual color after firing before proceeding with the main production.
Related Concepts
Combining knowledge of ionization tendency, metal oxides, and coloring versus discoloration improves the accuracy of color-layering predictions.
This entry is written in Japanese by Rei Chikaoka and translated for readers outside Japan. If something reads oddly, the original is the source of truth.