J.H. Leighton’s Patented Finishing Technique

[IowaMarble]

J.H. Leighton’s 1891 patent for the manufacture of solid glass spheres marks a major step forward in early American handmade marble production.   His process began by hand gathering molten glass on the end of a steel rod, carefully building up the amount needed for a single marble. While still hot and workable, the glass was rotated within a grooved former, shaping it into a near perfect sphere while remaining attached to the rod.

After the marble was formed, it was cut from the rod, leaving a small rough projection where the glass had been severed. Rather than leaving this as a simple cut mark, Leighton refined the surface through a controlled finishing process. The marble was exposed to a concentrated flame, softening the uneven area without disturbing the rest of the sphere.

Once properly heated, Leighton applied a specialized concave tool similar in appearance to a small golf tee to the softened spot with light pressure. This action pushed the remaining glass back into the body of the marble, smoothing and blending it into the surrounding surface. The result is the distinctive “melted” or “pressed” pontil, a defining characteristic of Leighton’s work and an important innovation in the evolution of American handmade glass marbles.

[Tommy]

love it ,thank you for posting this 👍🏼👍🏼

[Roberto]

Very important information!  

Great, Chad!👍

[lostmymibs]

Great info, thank you for sharing!

[akroorka]

21 hours ago, IowaMarble said:

Leighton refined the surface through a controlled finishing process. The marble was exposed to a concentrated flame, softening the uneven area without disturbing the rest of the sphere.

Great stuff here my marble collecting friend.

I learned quite a bit here and Leightons have alway been a mystery to me--Thanks!

Keep it coming!

Marble--On!!