| 摘要 |
A "highlighter" liquid for detecting cosmetic defects in non-metallic surfaces, particularly those intended for high quality automotive finishes comprises organic substances each molecule of which contains at least one continuosly chemically bonded chain or ring of atoms in which there are at least two carbon atoms and at least two oxygen, nitrogen, sulfur, and phosphorus heteroatoms, the carbon atoms and heteroatoms being arranged in such an order along the chain or ring that (i) each heteroatom is bonded to at least one carbon atom and (ii) the chain does not include more than three consecutive continuosly chemically bonded carbon atoms. Particularly suitable materials include glycerin, propylene glycol, low molecular weight glycol condensation polymers, and monoethers of these glycol condensation polymers. Water is also usually present in the highlighter liquid, which has a long open time and does not damage the substrate even if left in place for a day or more.
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