Re: Gum Dichromate print washing
Kent T. Rush (krush@lonestar.jpl.utsa.edu)
Wed, 5 Apr 1995 10:29:12 -0500 (CDT)
Dichromates are carcinogens. The normal sewer treatment plants do not
break them down and so they return to the environment. Dust masks should be
worn and the granules should be handled in a dust box. Latex gloves
should also be worn.
All but
the most dilute washing solution should be collected, the water allowed
to evaporate and the remainder sent to a toxic materials disposal
operation. I am facing this problem because I do collotype. So far I
have collected a few gallons of sensitizing solution and first rinse
washing solution and am letting it evaporate. I'll let you know what
happens when I try to deliver the sludge to a toxic disposal service.
Kent