Cork is obtained from the bark of the cork oak. Cork stoppers represent about 60% of all cork based production. One observation was from very thin slices of bottle cork. Other core materials include compressed felt, cork, and leather. It was filmed on location in Co Cork and Co Kerry Ireland. The ink was sealed inside the quill with cork. These freed portions of the cork are called planks. He is of Irish heritage with ancestors from Cork and Tipperary. It also has offices in Dublin, Belfast, Cork and Waterford. Foster also has Irish roots, with ancestry that can be traced back to County Cork. The expedition returned to Queenstown, County Cork, Ireland. Protests were held in Dublin, Cork, Limerick and Galway. Jessica's ancestors hailed from Kilcleer, County Cork, Ireland. Greene was born in Cork, Ireland. Summersby was born in Ballydehob, County Cork, Ireland.