How Do Correction Fluids like Liquid Paper and White-Out Work

How Do Correction Fluids like Liquid Paper and White-Out Work  

Typewriter correction fluid was first invented by Bette Nesmith Graham.11 2 Her early version for the product consisted of a white tempura paint to correct mistakes. Looking for a mixture that was both quick-drying and barely detectable, she discovered a formulation that she would later sell to the Gillette Company in 1979. The formula was modified slightly in the 1980s. What is the chemistry of Liquid Paper  

Paper correction fluids contain two key ingredients—a white (or colored) pigment and a volatile fluid solvent. The pigment is initially dissolved in the solvent, but, upon application to a surface, the solvent readily evaporates. A solid residue of pigment remains. If solvent evaporates from an open bottle of correction fluid, additional solvent in the form of correction fluid thinner can be added to redissolve the solid pigment. 

White-colored correction fluids like Liquid Paper and White-Out contain the pigment titanium dioxide (Ti02) and the volatile solvent 1,1,1-trichloroethane or methyl chloroform (CCbCf J3 The volatile substances in the correction fluid contribute 50% of the total volume of the productJ3 Correction fluid thinner is simply 100% 1,1,1-trichloroethane solvent 4 added to redissolve any solidified titanium dioxide. 

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