It is hard on thin glass, but the thicker it is, the easier it is to tell. Looking sideways into the glass if you see a green tint, it is boro, if is is super clear, it is quartz. Quartz is just a little more clear
This comes down the knowledge the blower processes. All colors will build, and some boil more easily. Cadmiums can be considered hard to work with, but neat colors like unobtainium crack when used in many applications. All colors have pros and cons
People have used platinum to fume, and it does not work well. Gold and Silver a best.
Yes, this is much how Avant Garde is done.
If it makes me feel good, the butter color is named. I like to look at history, look at what is influential in society and to me. I like to shed light on some past characters, and cause a stink. Life is short, have FUN
This is because each color is not the same COE.
Quartz does not work like boro. Our torches do not get hot enough, as well as our blowers are not fully skilled in quartz like they are in boro.
Like all colors they all kinda work differently. But mostly all butters work the same with the heavy layer of clear on top. Butter works EASY!
Yes, 100% made just like the glass in the USA, but more of a production line where each blower does a part, and not a full build
It is basically vacuumed and sealed in clear glass You can only encase a synthetic opal and only a gilson synthetic opal. A natural opal will explode.