| 摘要 |
Colored images are formed on paper bases by contacting the latter at the points where said image is desired with a colorless dye dissolved in a carrier fluid, the surface of said paper base being coated with a uniform, discontinuous coating of an essentially solid, water-insoluble, fusible phenol-formaldehyde condensation polymer at the rate of 0.01 to 0.2 lb. per 1,300 square feet of surface.
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