10/18/2026
Do you know why stretching lead is vital⁉️
It tightens the lead, reducing its potential to sag, & thus preventing a project from eventually coming loose of its frame (eek!). Since lead is a “soft” metal (meaning it’s highly malleable/easily hand-bent), when it’s used as framing channel, it’ll slowly stretch due to gravity & project weight. Given enough time, it can pull away entirely, leaving the project able to run free (most likely sprinting fatally to the floor).
The importance of this activity is directly correlated to the size/weight of the project, so although I recommend always stretching lead just to be safe, its necessity is somewhat dependent upon the specific project & artist’s preference.
I should also mention that I’ve never personally been able to adequately stretch lead by hand/pliers alone. Not sure if I’m ridiculously weak or just have awful technique or what, but I mentioned this alternative method because many other artists have successfully done it, & lead stretchers are surprisingly expensive, so it’s important for beginners to know a workaround exists.
This lead-specific excerpt is from Lesson 7 of STAINED GLASS BASICS (an instructional course I created with Oceanside Glass )!
The full lesson is freely available on my site/YouTube (and Oceanside Glass ‘s) along with all previous lessons. This one will introduce you to various different framing materials, explain how the shape/size/hardness of each one affects the projects it’s most suitable for, demonstrate how to measure & cut material to size, & let you in on much more framing fun!