The stamps are made of soft bronze, engraved according to a precise model which is submitted to your agreement.
The ink is permanent, oily and doesn't become altered with time. It makes the work of the restorer easier.
The inking stamps are virgin and have to be only used with the oily ink.
This technique can be used on every paper medium or parchment. It requires a little time for dryin before covering. Allow small fleece papers to dry the ink.