>From the UL Test Data Sheets provided to me by my UL engineering office, the
material listed in the text of the test data sheet is kerosene.
I don't know what the actual physical characteristics are, but if UL uses this
for their test I would assume that it is acceptable for me to use.
Kerosene is an easy product to obtain and is not that expensive.
I have included an excerpt of the UL 1950 test data sheet that I was given by
UL.
Oscar
##### Excerpt from the UL 1950 Test Data Sheets #####
1.7.15 - PERMANENCE OF MARKING TEST:
METHOD
A sample of the marking label was subjected to this test. The surface of
each marking as noted below was rubbed by hand for a period of 15 seconds with a
water soaked cloth, and again for a period of 15 seconds with a cloth soaked
with the petroleum spirit noted below.
RESULTS
TEST CONDITIONS:
Use of Marking _____________ ____________
Material _____________ ____________
Held by _____________ ____________
Applied Surface Material _____________ ____________
OBSERVATIONS:
Water Kerosene
Any Damage? _________ _________
Legible? _________ _________
Curled? _________ _________
Edge Lifted? _________ _________
Easily Removed Intact? _________ _________
The marking was/was not durable and legible.
Comments:___________________________________________
_____________________________________________________
Document: 060.Eng
##### End of Excerpt from UL 1950 #####
kmccormickinc%hotmail....@interlock.lexmark.com on 01/02/2001 01:12:36 PM
Please respond to kmccormickinc%hotmail....@interlock.lexmark.com
To: emc-pstc%ieee....@interlock.lexmark.com
cc: (bcc: Oscar Overton/Lex/Lexmark)
Subject: Seeking assistance from Chemical Experts
Recently, I was asked to show that the hexane that I was using for UL1950
and related standards (Marking durability test of 1.7.15) infact complied
with the requirements in the standard, Specifically:
"The petroleum spirit to be used for the test is aliphatic solvent
hexane having a maximum aromatics content of a 0.1% by volume, a
kauri-butanol 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."
I am communicating with the company that I purchased the chemical from, and
all I get is the MSDS Sheets which do not have all of the above information.
Has anyone else had to locate these specifications? How did you go about
obtaining them. I am not opposed to having a lab test for these
characteristics, but I have no clue where to begin with such a
test...chemistry was NOT my best subject!
I know that this conversation came up in the past and I believe everyone
agreed that standard hexane would suffice...I just need to be able to show
that hexane meets the above requirements.
Thanks in advance,
Kenneth
_________________________________________________________________
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