For the people who have not used liquid flux pens. They come in regular, no-clean, and water-soluable formulations. Could be more.
At first take it does seem wrong to make flux that needs to be removed. Maybe you can make a more aggressive flux if you expect the user to remove it. Could be less expensive to manufacture.
My sample is not large but, the must-be-removed flux pen was about half the price of the no-clean pen. The must-be-removed flux is more effective but the no-clean works well enough if the board is not too oxidized.
At first take it does seem wrong to make flux that needs to be removed. Maybe you can make a more aggressive flux if you expect the user to remove it. Could be less expensive to manufacture.
My sample is not large but, the must-be-removed flux pen was about half the price of the no-clean pen. The must-be-removed flux is more effective but the no-clean works well enough if the board is not too oxidized.