Join Arnie Janson as he sheds light on the intriguing phenomenon of lithobubbles, focusing on the Canadian 2002 Scott/Unitrade #1965 stamp. Arnie’s thorough presentation demonstrates the regular occurrence of these lithobubbles, specifically within the blue ink of the stamp. With a collection of over 100 examples, he provides a captivating look into this unique aspect of stamp printing. This presentation is sure to spark your curiosity and send you searching through your lithographic stamps for lithobubbles.