I have always preferred the etching press method for monoprints rather than using a gelli plate, it gives a more even tone of colour and also uses printing ink which lasts longer and retains its colour. To see my gelli prints follow the link
Monoprints: The Tree That Wanted to Fly: size 10 x 12 ins. Caligo Relief printing ink. Size 10 x 12 ins. Printed on 280 gsm paper.

