1. Positioning Bottle
The bottle is placed lengthwise on the cutter with a bottom flush against backstop and resting on the rollers. The position of the backstop and rear rollers determines the point at which you cut the bottle.
To adjust the length, loosen screw and slide backstop and rollers forward for a shorter cut and backward for a longer cut.
2. Etching the Glass
A light etch is all that is required. Apply only slight pressure on the bottle while rotating the bottle toward you with your hand. To ensure an accurate cut, keep the bottle firm against the backstop.
Do not allow the bottle to stop turning while scribing the etch. A slight crunching sound will signal the completion of the etch. One revolution of the bottle is all that is necessary.
3. Separating the Bottle
Soak the bottle in boiled water (must cover the scoreline), slowly rotate the bottle in one direction for one to two minutes.
Then soak it in cold water quickly, also rotate for one to two minutes. You may hear audible “clicks” indicating that the etch are cracking, you can separate the bottle.
Sometimes, it’s necessary to repeat the boiled and cold water soaking steps several times depending on the thickness of the glass.
4. Smoothing the Edge
To prevent chipping, rub the inside and outside edges lightly with the polishing paper. After a short time, the edge of the glass will become perfectly flat and have a dull gray appearance.