Cubic texture is a particular crystallographic orientation which is necessary for high voltage etching. If not enough grains have cubic texture, the pits created during high voltage etching are not perpendicular to the foil, resulting in a too little surface increase.
Pechiney discovered and patented in the 70’s a revolutionary manufacturing process enabling to obtain very high levels of cubic texture on high purity foils. This process has now been adopted by all anode foil producers around the world and is still in use at PHP/ Froges.



After a chemical treatment of the foil, cubic texture is now measured via image analysis on each high voltage foil shipped.

Values are given to customers on request.

They are typically over 95 % and frequently reach levels higher than 99% !