Glass compositions suitable for pot and marble fiberization display excellent chemical resistance to both acids and moisture while being highly biosoluble at the same time. The glass compositions are characterized by ratios of components which are reflective of acid resistance, biosolubility, and moisture resistance. Preferred glasses have a difference between HTV (10.sup.3 poise) and liquidus greater than 500.degree. F., and a biodissolution greater than about 350 ng/cm.sup.2 /hr.

Las composiciones de cristal convenientes para el fiberization del pote y del mármol exhiben resistencia química excelente a los ácidos y a la humedad mientras que siendo altamente biosoluble en el mismo tiempo. Las composiciones de cristal son caracterizadas por cocientes de los componentes que son reflexivos de resistencia, de biosolubility, y de resistencia ácidos de la humedad. Los cristales preferidos tienen una diferencia entre HTV (equilibrio 10.sup.3) y el liquidus mayor que 500.degree. F., y un biodissolution mayor que cerca de 350 ng/cm.sup.2 /hr.

 
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