| 摘要 |
PCT No. PCT/FR87/00071 Sec. 371 Date Oct. 19, 1987 Sec. 102(e) Date Oct. 19, 1987 PCT Filed Mar. 13, 1987 PCT Pub. No. WO87/05595 PCT Pub. Date Sep. 24, 1987.Process for lubricating a surface for the manufacture of a glass object, in which a layer of lubricant is periodically deposited on the surface. This layer of lubricant is produced with the aid of a source of heat such as an oxyfuel flame having a temperature higher than 2000 DEG K. through which there is injected during a given period of time a gaseous hydrocarbon or a mixture of gaseous hydrocarbons comprising at least 15% of a constituent in respect of which the ratio [fo] of the number [oc] of carbon atoms to the number of hydrogen atoms C/H is higher than 0.75. The rate of injection of the hydrocarbon through the flame and the temperature of the latter are controlled in such manner as to obtain a porous layer of carbonaceous particles capable of burning in the air when they are deposited on the glass object when the latter is still hot.
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