These surfaces rapidly absorb the polish, while the oil in the dabber allows it to pass over without clinging.
The dabber not only equalizes the distribution of the varnish, but also removes what is superfluous.
Some engravers prefer the dabber to the roller even for regrounding entire plates.
A sheet of damp paper was laid on it and the back of the paper was carefully rubbed with a dabber or burnisher.
When it is not available the dabber must be employed in the old manner.
To equalize the ground a dabber was used, which was made of cotton-wool under horsehair, the whole inclosed in silk.
Clay of the desired thickness is then rolled out as described and applied to the mould and dabbed flat with a sponge or dabber.
Then try it by bringing down the dabber upon a clean sheet of paper with a smart blow.
This forms a dabber, and should have something to hold it by.
But if you desire to do your own proving, you will have to use a dabber, the manner of making which is described in the next note.