This is when a small piece of glass is made into a filligrana and pulled into a stringer. Then the artist just scribbles. The clear around the glass keeps the colors small and tight
Fab percs are made very carfully. It is made just like any doughnut in glass, but a lot of t
Yes, an artist can do this many times, even trapping air in the relief sandblasted areas and sleeving it.
Yes, glass can be re worked in the torch after it is sandblasted or graaled.
Yes, it is very expensive and does not add much, so it is rarely ever used in glass.
Yes and no. Our alien skin is a form of bubble trap, that is also fumed with gold and silver. See this for more info on bubble trap Cobalt Alien Skin Silver and 24k gold fume on top of Cobalt
The most useful technique is knowing how to make a marble round. Knowing when the glass is at what consistency and what happens at that consistency.
Really there is not colored quartz, but it is usually fumed on the outside, to make it look colored. The quartz melts at such a high temperature that the minerals burn out.
All glassblowers in the world can order butter color here. They can also buy lined tubing here
With skills. Some will use a graphite tool and some will eye it. You can see our line of proxy glass here.