Removing the nib and feed of a Parson's Essential
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In this video we mention the use of an Ammonia solution. It is important to use only household ammonia, dilute in in a mix of 90% water and 10% ammonia with a drip of dishwasher detergent. Warning ammonia vapour can sting the nose and eyes, use with caution. Follow maker's instructions and keep out of the reach of children.