A glass filler powder includes a bubble therein, a volume fraction of the bubble being from 0.2% to 2%.

The present disclosure is directed to glass spheroids and methods of making these spheroids that have significantly increased resilience to applied pressure and surface scratching. In addition, the present disclosure is directed to tailless Prince Rupert's Drops and methods of making tailless Prince Rupert's Drops.

The glass contains a Ti component in a glass composition, in which a Ti.sup.3+ ion content is 80 ppm or less.

The present disclosure is directed to glass spheroids and methods of making these spheroids that have significantly increased resilience to applied pressure and surface scratching. In addition, the present disclosure is directed to tailless Prince Rupert's Drops and methods of making tailless Prince Rupert's Drops.

The present disclosure relates to a method of making nanoparticles from glass, the method including: gathering glass waste; hammering the glass waste into ready to grind pieces; adding an amount of the ready to grind pieces into a grinding bowl; adding steel balls to the grinding bowl; grinding the ready to grind pieces; and obtaining a powder containing the nanoparticles.

A process for the manufacture of frit, comprises at least the following phases of: supply of a molten glassy mixture at a temperature above 1.150 C.; first cooling of the molten glassy mixture; and, subsequent to the first cooling phase, at least one second cooling phase of the molten glassy mixture to form a frit.