Composition. The most common types of glass fiber used in fiberglass is E-glass, which is alumino-borosilicate glass with less than 1% w/w alkali oxides, mainly used for glass-reinforced plastics.he first type of glass used for fiber was soda lime glass or A-glass (A for the alkali it contains). It is not very resistant to alkali. A new type, E-glass, was formed; this is an alumino-borosilicate glass that is alkali This was the first glass formulation used for continuous filament formation.
White patches are the main symptom of oral hairy leukoplakia. The patches are: White and âcorrugated,â or folded, in appearance. Hairy, hair-like growths come from the folds in the patches. Permanent, you canât remove the patches with a toothbrush or with another oral care tool.
As such, leukoplakia is not a specific disease entity, and the clinical and histologic appearance are variable, i.e. the term has no specific histologic implications. Leukoplakia may be confused with other common causes of white patches in the mouth, such as oral candidiasis or lichen planus.The lesions of leukoplakia cannot be rubbed off, as would be the case in pseudomembraneous candidiasis (oral thrush).nother very common cause of white patches in the mouth is frictional or irritational trauma leading to keratosis. Examples include nicotine stomatitis, which is keratosis in response to heat from tobacco smoking (rather than a response to the carcinogens in tobacco smoke).