Printech Archive, October, 1998: Re: Indoor air quality in print shops

Re: Indoor air quality in print shops

Ted Hughes (
Mon, 2 Nov 1998 07:30:03 -0500

Is this amount of ozone per lamp? Does it change based on the length of
the lamp? Also, is the ozone generated number based on ambient or is
this the amount that would be sent up the exhaust. If an exhaust unit is
utilized, is there any measurable exposure to the workers?

>From: Carl Sharp[]
>Sent: Friday, October 30, 1998 10:16 AM
>Subject: Re: Indoor air quality in print shops
>At 04:21 PM 10/29/98 -0500, you wrote:
>>Return-path: <>
>>Cc: ingegeria sanitaria <>
>>Subject: Indoor air quality in print shops
>>Date: Thu, 29 Oct 1998 11:34:11 EST
>>Mime-Version: 1.0
>>Content-type: text/plain; charset=US-ASCII
>>Content-transfer-encoding: 7bit
>> In a 10/23/98 message, Dr. Eng. Sergio Cavalerri asks for information on
>>ozone emissions from UV lamps used in the printing industry. Dr. Cavallari
>>should not worry.
>> The amount of ozone generated by such lamps is exceedingly small . These
>>lamps give a steady state concentration, while running, of less than 0.02
>>parts/million. This is about 1/5 of the 0.1 ppm allowed for continuous
>>exposure to ambient ozone as specified by the American Conference of
>>Government Hygenists. At this level, the ozone is barely detectable by a
>>sensitive human nose.
>>Alexander Ross, Ph.D.
>>RadTech International, N.A.
> Just as a side note to the Ozone issue from 10/23/98. Ozone is a very
>unstable molecule and will oxidize materials in the air and quickly
>breakdown to form oxygen. Just don't sniff the lamps will they are on and
>there should not be a problem.
>Carl Sharp
>Printing Indust. Assoc.
>of the Heartland



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