Butt seal - Part 5

Last (close window) Next


Remove the glass out of the flame and rotate it for a few moments till the heated region is fairly uniform in temperature (look for uniform color of the glass). If the glass looses all color, you have waited too long (or didn't have the glass sufficiently heated) and will need to reheat the glass. Now, blow into the end and increase the diameter of the working area till it is just larger than the outside diameter of the original tube.