Hello All,
Thanks for your helpful replies to my question. BUT.....
I agree completely with the sentiment that a liquid flux, which is claimed
to be halide free, should only have contaminant levels of halide. Certainly
a few tens of ppm would be what most people would expect.
The difficulty comes when talking about solder pastes, where the J-STD004
also applies to the flux. Here I have come across customers who regard the
chromate paper test as evidence of halide free, that is, they are happy
with a detection limit of approximately 0.05% (maybe they do not realise
this is the detection limit, but that's another story). These customers
would presumably be expecting the quantitative test limit to reflect this
as well, i.e. <0.05% which is what Table 2 implies.
Looks like there is a need to clarify the position in the specification, if
we can get everyone to agree what they actually want it to mean!
Regards, Malcolm

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