Reticulated Hydro Sponge

These hydrophilic foams are relatively dense sponges with a high tensile strength and elongation at break.

These characteristics make them ideal for cleaning, smoothing and fettling ceramics during the casting process, as they are tear-resistant. This means that the sponge does not disintegrate during use, which is very important.

Cheaper and lower density sponges can disintegrate during casting, which causes small pieces of sponge to stick to the ware before it is glazed. If this happens, then the sponge burns off during the firing process and causes pin-holes in the surface of the ware, which renders the finished product to be un-saleable.

Therefore it is better to spend more money on high quality sponges, rather than to purchase low quality sponges and risk losing money on potential product losses.