As I recall, the requirements for label durability came years ago from
UL, where the original test specified kerosene.
As the standards evolved, propagated and became international, the term
kerosene was complained about since it varied worldwide. In attempts to
be more specific, someone came up with the description which now appears
in IEC 60950 clause 1.7.3 (for kerosene I assumed). It seemed acceptable
and none of us had the expertise to improve or change it.
Describing petroleum distillates is a pretty vague problem anyway. It's
a lot like trying to chemically describe smoke. It depends on the
source, the cracking process, the distillate fractions, etc.
In general, the lighter the distillate, the better it will dissolve some
things. You can get anything from wax to lighter fluid to gases from the
same process.
You might be able to get a chemical supplier to match the description
from the standard, you may want to try something rather worst case like
lighter fluid, but your best bet is to get agreement on what to use
between you and the agency you are certifying with.
Bob Johnson
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