| 摘要 |
<p>A method of gutting glass by scoring and snapping, with application of a gutting fluid to the glass during scoring, in which the cutting fluid comprises a hydrophobic, water-insoluble, oily liquid, e.g. a hydrocarbon oil or a synthetic ester of phthalic acid, diluted with a volatile organic solvent, e.g. a substituted hydrocarbon with a boiling point not more than 100.degree.C above the temperature at which the glass is maintained during scoring and snapping, the solvent being also hydrophobic and waterinsoluble and being subsequently removed from the glass by evaporation. The oily liquid normally comprises less than 20%, and in most cases between 1% and 10%, of the cutting fluid, being thereby extended to cover a such greater length of cut and rendered much easier to clean off the glass, while its efficacy in assisting cutting is substantially retained. A surface active agent, e.g. a coconut fatty amine/ethylene oxide condensate, may be included in the gutting fluid to assist in washing the traces of oily liquid off the glass after cutting.</p> |
