[sanking]

If objections to use of dichromates are based on valid environmental concerns regarding industrial waste disposal that is one issue.

If objections are based on concerns for one's personal health, that is another issue.

Having used dichromates in carbon photography for almost three decades, and carefully considered the risks, my opinion is that there is less risk involved with the use of dichromate in making gum and carbon prints than the risk involved dozens of activities that people engage in on a regular basis, not including smoking cigarettes and heavy alcohol consumption. Once the dichromate is in solution the concern is almost entirely dermatological, unless one decides to drink the dichromate.

I can understand why governments want to regulate and/or reduce/eliminate the use of dichromates. But for the individual making gum bichormate or carbon prints there is, IMHO, virtually no risk to health, assuming reasonable care in mixing.

Sandy King

smieglitz... It is not big problem to remove bichromate safely for me (read below). It is a problem for our government.

Cheers,
Luke