Firing fish eyes

Butyl benzyl phthalate, alkyl (C7-C9) benzyl phthalate, and Texanol benzyl phthalate are frequently selected to increase gloss of calendered films and to reduce fish eyes and other imperfections. Phosphate esters are selected for fire retardant, clear films having low temperature flexibility. 

Then in that temperate Balneum let your glass stand unremoved by the space of fully 150 days, and until the stone within the glass become first russet and after whitish green, and after that very white, like unto the eyes of fishes, which then is Sulphur of Nature flowing, and not evaporating in fire, and our white stone ready to be... 

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