References in periodicals archive ?
Critics have essayed more profound interpretations, but they bear a close resemblance to the Chinagraph markings that photographers employ on their contact prints to indicate the precise area of the negative that requires enlargement.
On the positive side, though, the Tuffmap will take a wax pencil like a Chinagraph - ideal for marking the important details of a route - and then allow you to wipe it clean later.
Symbols in chinagraph pencil showed the position of a heavily armed Iraqi tank division.