…If a glass composition that is easily crystallized is selected, a metal colloid is precipitated, and then the glass is further heat-treated near its softening point, crystals will precipitate from the metal colloid as crystal nuclei. This type of glass is called a photosensitive opal glass. If the solubility of the precipitated crystals in acid is significantly different from that of the glass phase, it is possible to selectively remove only the crystallized parts, i.e., the parts exposed to light. … *Some of the terminology that refers to "photosensitive opal glass" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…結晶化しやすいガラス組成を選択しておき,いったん金属コロイドを析出させたのちさらに軟化点付近で熱処理すると,金属コロイドを結晶核として結晶が析出する。このようなガラスは感光性オパールガラスと呼ばれる。析出する結晶の酸に対する溶解度がガラス相と大幅に異なる場合には,結晶化した部分,すなわち光が照射された部分だけを選択して除去することができる。… ※「感光性オパールガラス」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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