Regular paper towel, which is very absorbent, was subjected to treatment which changed its properties.
The treatment leaves no residue on the paper.
The following photo shows:
Left: Untreated paper. A drop of ink spreads easily.
Right: Treated paper. A drop of ink stays in its place and does not spread.
Is it similar to results obtained with gum Sandarac? (The treatment is not gum sandarac.)
Is it useful for treating klaf to obtain sharper writing?