METALS_化学配方数据库_化工助手

化工产品及用途数据库香料库颜料库染料库化学配方数据库畅销药物查询系统药物化学大辞典 FDA药品批准信息 FDA药品独占权信息 FDA药品专利信息 DMF提交信息库

化学配方数据库

配方类型：	METALS
配方说明：	Developing the Color
配方组成：
配制方法：	One or two seconds exposure to a moist ammonia atmosphere will cause the formation of a dense insoluble dye in the unexposed areas of the aluminum. The background sometimes contains a white precipitate. Dyes generally change color with pH. For this reason the final color appears only after the ammonia has completely evaporated.