| 摘要 |
An erasable marking composition comprising a noncarboxylated styrene-butadiene copolymer resin, a colorant, and a solvent. The composition can be applied to substrates by a variety of delivery means, such as porous-tipped and brush-tipped writing instruments, as well as brushes, and can be easily erased with a substantially nonabrasive eraser, such as a common pencil eraser, for an extended period of time.
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