PURPOSE: To obtain a brazing sheet which facilitates identification of different alloys on the front and rear of this brazing sheet without impairing its degreasability and brazeability and exhibits an industrially remarkable effect, such as freedom from generation of pollution problems caused by an org. solvent.
CONSTITUTION: This process for producing the brazing sheet 5 which is formed by using Al or Al alloy as a core material and cladding brazing filler metals 3 on at least one surface thereof and is identifiable of the front and rear comprises rolling the brazing sheet to a prescribed thickness, then passing the brazing sheet between upper and lower rolls varying in front surface patterns without changing the thickness of the heat, there by changing the surface patterns of both surfaces.
TACHIKI KAZUSANE
TSUCHIYA HIRONORI
OZAWA TETSURO