Well-known studies proved that the recharge to vacuous brings damages to the impression head.

Technical explanation:

The impression head is very fragile. Because of it, the manufacturer of the cartridge projected a channel of provisioning, denominated maze, exactly with the purpose to use the impression head to process the impression work.

The action of the vacuum process directly on the impression head causes microfissures in the collage of the little plate (rectangular) of the impression head. This process reduces the useful life of the cartridge.