[log in to unmask] wrote:
>
>      All,
>
>      Would like to know if fresh no clean flux should contain water.

It depends on the no-clean flux.  IPA-based fluxes do not contain
water except as a minor contaminant.  I don't have a concentration
level, but it will be the water level of the fresh IPA used to
prepare the flux.  There is no reason for the water except that
IPA with a little water is a lot cheaper than IPA with almost no
water.  IPA-based fluxes will absorb water if exposed to humid
air, allowing the water content to increase with time.  VOC-free,
no-clean fluxes use water instead of IPA as the solvent, 95-98%
by weight.  The reason for the water is that IPA is a VOC, so
water is more environmentally benign.

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