| http://www.w3.org/ns/prov#value | - The slurry is produced by adding to an organic binder comprising polyvinylbutyral or the like, a plasticizer comprising di-n-butylphthalate or the like, and a solvent produced e.g. by mixing toluene and isopropyl alcohol at a ratio by weight of 30:70, a glass-ceramic which is a composition comprising lead borosilicate glass powder and alumina powder at a ratio by weight of 50:50, and mixing them.
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