The best, and earliest, are blown freehand in clear glass with heavy base, and pontil
marks either ground out or left rough where the finished glass was snapped off the glass pontil
rod from which the piece was made.
is a metal rod used in the process of what?
et al, describes support vector machine for 3-D object recognition from the available detected objects.
His oldest exhibit was a German, black glass wine bottle with snapped pontil
You would expect at this date the base to be either ground at or to have a wide and shallow ground pontil
mark, as this decanter does - later on this mark becomes smaller.
or punty marks, sometimes ground smooth, on the underside of the foot of a glass confirms it was hand-blown (usually anyway).
Each gather of molten glass is carried from tank to glory hole, where it is formed "at the fire" with blowpipes, pontil
rods, shears, calipers and other tools little changed over centuries.
Other liturgical texts include a passage from the Credo of the Mass ending the fourth movement when Christ is condemned, "Cruxifixus etiam pro nobis; sub Pontil
Pilato passus et sepultus est," ("He was crucified for us; He suffered under Pontius Pilate and was buried").
The plate at the bottom of the stack invariably shows evidence inside the footring of having been fired on a ceramic pontil
, or tubular support.
Drinking Glasses: To discover the age of a drinking glass look at the pontil
Minerex of Accra, Ghana conducted the drilling and assays were done by SGS of Tarkwa, Ghana.
Genuine Loetz is always well made, often with a ground and polished pontil
mark to the base, as here.