I have had groups of students make single coat carbons after one
demonstration. It is not just a matter of Klaus doing it well. There is no
great mystery to the single coat carbon. Victorian photographers used to
get ' the boy ' to make them.
As to heat all you need is some ice to make a water bath ! I have even
had classes make carbon resists for gravure successfully with the ambient
temperature in the nineties.
Terry King
Terry King