Structures with a voids volume of greater than 50 % are obtained with the method.

The active material layer has a void ratio of 15 to 45%.

The active material layer has a void ratio of 15 to 45%.

The base member (5) comprises a porous body having a porosity rate of 80% or higher.

These beverages have some acidic property and they raise the porosity level of the external teeth layer.

The porosity degree, in other words the ratio between the total surface of the holes and the total surface of the walls is preferably at the most equal to 30 %.

This method enables to produce deposits of a few tenths up to several millimeters thick with a porosity rate of 2 up to 15%.

DYNAFOND is equipped with a n X-ray machine to monitor the rate of porosity of manufactured parts and improve full control over its process.

The absorbent layer has a structure that is divided into a primary absorbent layer and a secondary absorbent layer by a fiber substrate having a void ratio of 91% to 99%.

The superhard filler hardmetal (10) has a porosity rating of substantially A06, B00, C00 or better and may be essentially pore free, i.e., A00, B00, C00.

The intermediate film (1) for laminated glasses involves a first layer (2) which has hollow parts and shell parts, has a void ratio of 40-80% inclusive and contains silicon dioxide particles (51).

The pore area ratio of the magnetic material ceramic in the side gap part between the side of the internal conductor and the side face of the magnetic material ceramic element is in the range of 6 to 28%.