Disposable sheet for the detection of radioactive substances
The present invention provides a disposable sheet including: a waterproof layer formed of a plastic sheet.; an intermediate colored layer formed of a water-based solvent absorbent material containing a dye soluble in a water-based solvent; and a non-colored layer formed of a water-based solvent absorbent material thereon. Contamination by a transparent and colorless toxic substance-containing water-based solution, which leaves no trace after drying, when the solution spills over the disposable sheet, can be easily detected and expansion of secondary contamination due to a hazardous material can be prevented. <IMAGE>