Hi Daniel,

Flux selection should be primarily a function of board design. Generally
speaking, thinner fluxes tend to give better coverage with better rinsing.
Thicker back panels need longer immersion times so they require a little bit
higher viscosity product. Most products today have a hydrobromic acid
activation package rather than HCl. This helps with the life of the equipment
as well better ionics. Typically your vendor will be able to give you one
flux to fit all your applications. We sell nearly 20 different vertical
fluxes but two products make up nearly 75% of our sales. I will be more than
glad to speak to you off line if you need additional information.

Regards,
Chris McGary
Dexter / Alpha

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