Charles hasn’t given up on the tradition of using fountain pens, which he inherited from his mother, Queen Elizabeth II.

King Charles has granted a royal warrant to Parker, the same manufacturer of the fountain pen that leaked during a royal engagement last year.

Charles used a fountain pen to sign a visitor’s book at Hillsborough Castle, located in the Village of Royal Hillsborough, 12 miles from Belfast.

The pen leaked on the monarch, getting all over his hands, with him exclaiming, “I can’t bear this bloody thing … every stinking time.” While the pen was misbehaving, the king didn’t give up on fountain pens.

The Telegraph’s Patrick Sawyer writes: “One would have imagined that after famously losing his temper when ink leaked over his hand at Hillsborough Castle the King wouldn’t want to see another fountain pen.”

“But a good monarch is nothing if not magnanimous, which may explain why King Charles has decided to renew the royal warrant for Parker, one of the world’s most famous fountain pen manufacturers.”

Charles’s Garden Party was the same day as Harry’s Invictus Game reception (Image: Getty)

Queen Elizabeth II used Parker fountain pens for decades, which Charles then in turn started using as part of his official duties.

Parker was founded in 1888 and received an official warrant from Queen Elizabeth II in 1962.

“Royal warrants are granted for up to five years at a time as a mark of recognition for the ongoing supply of goods or services to the royal household and senior members of the Royal Family,” says Sawyer in his Telegraph article.

Charles recently spent the day with William at an army base (Image: Getty)

Jenny Collier, a calligrapher and illustrator with London Scribes, spoke to The Telegraph about the impact of royal warrant has for an origination: “Being granted the new warrant by His Majesty the King is a huge honour.”

“The royal warrant brings worldwide attention to UK businesses who work hard to uphold the highest standards and maintain traditional skills.”

Charles gave out 172 royal warrants as Prince of Wales, and those holders who would like to receive a royal warrant from him as king would have to reapply. Charles just recently confirmed 145 of those royal warrants had been retained, it’s being reported.