PATENT OF TEST TUBE (1890)

Text on the reverse side:

The laboratory glassware can range in size from a couple of inches to several inches in length, as well as various diameters. In order to resist the heat of the flame, expansion resistant material such as borosilicate glass is used in its production.

• A6 size (148mm x 105mm)
• Luxury pearlescent eco certified paper
• Produced in our London studio
• Trivia fact on the reverse
• Biodegradable packaging

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