- Brand: Chalcedony glass
- Product Code: Glass sculptures
- Availability: In Stock
- Dimensions (L x W x H) 0 x 16 x 45 cm
- Weight: 4 kg
- Ex Tax: €700.00
Sculptures in Chalcedony glass, such technique encloses a special workmanship secret. Only some master glassmakers in Murano Island of Venice, know about its components. The result is transparent glass with multicoloured veins, imitating a variety of natural chalcedony, zoned agate. Invented on Murano in the mid-XVth century. Its difficult preparation requires the addition of various metallic compounds to the glass mixture, in specific ways and at specific intervals. The secret of its manufacture, lost between the end of the XVIIIth century to be rediscovered the first half of the XIXth. Certificate of authenticity, as Murano glass items made in Murano, Island of Venice, Italy, signature of the master-glassmaker, insurance and good quality packaging are included in the price.
Glassblowing is a glassforming technique that involves inflating molten glass into a bubble (or parison), with the aid of a blowpipe (or blow tube). A person who blows glass is called a glassblower, glassmith, or gaffer. A lampworker manipulates glass with the use of a torch on a smaller scale, such as in producing precision laboratory glassware out of borosilicate glass.
Mold-blowing was an alternate glassblowing method that came after the invention of free-blowing, during the first part of the second quarter of the 1st century AD. A glob of molten glass is placed on the end of the blowpipe, and is then inflated into a wooden or metal carved mold. In this way, the shape and the texture of the bubble of glass is determined by the design on the interior of the mold rather than the skill of the glassworker.
This method held a pre-eminent position in glassforming ever since its introduction in the middle of the 1st century BC until the late 19th century, and is still widely used nowadays as a glassforming technique, especially for artistic purposes. The process of free-blowing involves the blowing of short puffs of air into a molten portion of glass called a '"gather" which has been spooled at one end of the blowpipe. This has the effect of forming an elastic skin on the interior of the glass blob that matches the exterior skin caused by the removal of heat from the furnace. The glassworker can then quickly inflate the molten glass to a coherent blob and work it into a desired shape.