Laboratory Flask Value Guide

This mid-century laboratory flask represents a pivotal era in American scientific advancement, crafted from durable borosilicate glass designed for extreme heat resistance. Collectors prize these vessels, particularly from iconic brands like Pyrex and Kimax, for their sleek industrial aesthetic and historical significance in 20th-century research.

What affects the value of Laboratory Flask?

• The presence of original branding and clear, legible measurement markings significantly enhances the market value.
• Physical condition is critical; flasks without chips, cracks, or heavy chemical staining command the full $30-$50 price range.
• Rarity of the specific shape or size, such as specialized narrow-neck variants from the 1950s, can drive interest among scientific glass collectors.

How to Identify Laboratory Flask?

• Look for embossed or printed manufacturer marks such as the Pyrex or Kimax logos typically found on the side of the flask.
• Check for specific volume measurements and graduations etched into the glass, which were standard for 1950s-1970s US production.
• Verify the material is borosilicate glass, which often has a slight thickness and a characteristic clarity compared to standard soda-lime glass.

History of Laboratory Flask

Laboratory glassware, including flasks, has been instrumental in scientific advancements for centuries. Early alchemists and scientists used glass vessels for various experiments. The design evolved significantly with the advent of borosilicate glass in the early 20th century, which allowed for greater heat resistance and chemical inertness. Brands like Pyrex and Kimax became household names for producing durable and reliable lab equipment, some of which are now collected as vintage scientific artifacts.