Among hand made bottles, certain techniques for hold and gathering the glass changed over the time.The most important identifying feature of the antique bottles is the pontil or scar, on the base of the bottle.[Keep in mind that pontil scars are still found on modern-day artisan made or boutique glassware pieces.] Pontil marks may be open rings or solid disks.Open pontil marks can be highly variable in appearance and were made by the same type of blowpipe used to make a bottle.Two terms often seen to describe these bottles are ABM bottles, for "Automatic Bottle Machine" and BIM or BIMAL for Blown in mold, applied lip bottles.Most Bottles were entirely machine made after 1910. The period in between includes some interesting hybrids of the two methods.Iron pontils were solid disk that often left a metallic residue on the glass.
The exception to that rule is that hand made bottles finely made, any unusual shape or color old bottle, or a bottle with pleasing aesthetic qualities, will always be sought after.
For the precise orientation and labelling of clip-lock bottles, our machines can be equipped with an orientation star at the bottle inlet in the factory or retrofitted with one in the field.
The label is gently brushed on in the machine and at a separate pressing station at the discharge star.
These scars were made when the glass tipped pontil rod (which is used to hold molten glass while it is worked) was removed.
Pontil scars are generally found on utilitarian bottles until about 1870.