THIS TECHNICAL REPORT IS A RESULT OF A ROUNDTABLE ORGANIZED BY THE ASSOCIATION FOR ELECTRONICS MANUFACTURING OF THE SOCIETY OF MANUFACTURING ENGINEERS (EM/SME) IN FEBRUARY, 1991. IT ADDRESSES ORGANIC ACID FLUXES, SOLVENTS, AND ULTRASONICS. BATCH SYSTEMS ARE DISCUSSED AS IS THE SEMI-AQUEOUS PROCESS. TESTING FOR CLEANLINESS IS EXPLORED. MEASUREMENT TECHNIQUES ARE DISCUSSED.