Hi David:
Two issues are involved here: 1) Label adherence to the surface to which it is attached; 2) Durability of the data printed on the label. I don't have a copy of UL 969, so I don't know if it addresses both issues. If you are dealing with UL, I'm sure you can get them to accept UL 969 without the 60950-1 durability test. However, if you are dealing strictly with 60950-1 (as in a CB report), then the label must pass the durability test. In my experience, there is not much difference between the required hexane and turpentine/paint thinner. If I recall correctly, turpentine/paint thinner is more severe than hexane. The test itself is not very repeatable, especially if the result is marginal. Best regards, Rich On 3/26/2013 12:31 PM, Gelfand, David wrote:
Brian, I am not an organic chemist either. With great effort I recall C and H with funny subscript numbers... We are using a UL 969-approved label system. Surprise, it didn't pass the hexane durability test! Looking through UL 969, there doesn't seem to be an equivalent durability test. It would appear that having a UL 969 approved label system does not guarantee passing the durability test as specified in 60950-1. Or as I asked my safety lab guy, "Did someone spike your hexane?" Has anyone ever encountered this problem before? Regards, David -----Original Message----- From: Brian Oconnell [mailto:oconne...@tamuracorp.com] Sent: Tuesday, March 26, 2013 3:01 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] 60950-1 durability test solvent Next paragraph says "As an alternative, it is permitted to use a reagent grade hexane with a minimum of 85 % as n-hexane. NOTE The designation "n-hexane" is chemical nomenclature for a ?normal? or straight chain hydrocarbon. This petroleum spirit may further be identified as a certified ACS (American Chemical Society) reagent grade hexane (CAS# 110-54-3)." I am not an organic chemist. Perhaps acetone or methylcyclohexane would be suitable alternate. Heptane is considered close, but do not know if easily sourced. Also, as hexane is on the U.S. and Canada list of really bad carcinogenic stuff, and TC108 needs to find something else that is a reasonably available equivalent. Perhaps the best long-term solution would be use of UL969-approved label system. Brian -----Original Message----- From: emc-p...@ieee.org [mailto:emc-p...@ieee.org]On Behalf Of Gelfand, David Sent: Tuesday, March 26, 2013 11:32 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: 60950-1 durability test solvent Is there a product I can buy at the hardware store that is roughly equivalent to the hexane specified in durability test: " The petroleum spirit to be used for the test is aliphatic solvent hexane having a maximum aromatics content of 0,1 % by volume, a kauributenol value of 29, an initial boiling point of approximately 65 °C, a dry point of approximately 69 °C and a mass per unit volume of approximately 0,7 kg/l." Thanks in advance. David Kontron Canada Inc.
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