Kokeshi Glass Pen

About This Product   Kokeshi glass pens are made by a Japanese glass artist using burner work. Burnerwork is a type of glass forming technique in which glass is melted and shaped by the flame of a burner. It's also known as lampwork and flamework.  There are two types of burners; the artist’s choice depends on the glass being used and the desired shape. Air burners are used to melt soft glass while oxygen burners are used to melt hard glass. These two types of burners generally have different applications, too: Air burner: glass beads, craftwork, sculpture, etc. Oxygen burners: accessories, vessels, scientific instruments, etc. As noted above, different types of glass have different levels of softness, which affects how the artist works with them: Soft glass: Glass with a COE of 130, which is lower than that of hard glass. In industrial products, glass up to about COE 80 is called ordinary glass. Hard glass: Glass with a coefficient of expansion (COE) of up to around 40, as typified