REF
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Rohrer & Klingner
REF
Bitumen for aquatint or for the production of covering ground.
In 250g bags in a cardboard box.
Bitumen is used in aquatint like rosin.
It adheres to metal by heating in the same way.
Note that it is soluble in gasoline and not in alcohol (important for the work flow of aquatint or the preparation of the covering ground)
Somerset velvet soft white 250gsm