I first tried the option where you use a cotton string soaked in acetone and set on fire. Major fail. Not one bottle crack. Moving on to the next option: buying a glass cutter and following instructions. Another major fail. I wasted about 5 bottles following their instructions (I tried 2 different types of cutters, one bought at Michael's, and one ordered on Amazon, called G2 bottle cutter). The bottles did crack, but in all the wrong places. After a lot of trial and error, I will share with you the "secret" to successfully cutting your old wine bottles in half.
Your score should look like this (see the line in the center of the photo. As you can see, it is very thin, and that is all you need to break the glass).
Light up a candle. Take your bottle and slowly place the score line over the flame, going all the way around.
After you have used the flame to weaken the score line (about 4 times), you will now place the bottle in the simmering hot water for 5 seconds, then the ice cold water for 5 seconds. Keep doing that until the bottles breaks at the score line.
(note: the glass on this photo broke in the cold water, I removed all of the ice after the water got cold enough so you could see the break, but you can just leave the ice in the water for the duration of the process)
What I have learned through trial and error:
- Your score line needs to be constant and very thin and not too deep.
- NEVER go backwards when scoring. If you miss a spot, go back over that spot, and spot ONLY.
- Stop scoring as soon as you have gone all the way around and hit your starting point. NEVER go back over a score (your bottle will break in all the wrong places if you do).
- Some bottles are easier to cut than others, depending on the thickness and type of glass.
- Most instructions tell you to use lubricating oil on the cutting wheel, I just used some Pam spray and it worked perfectly.
- Be sure to tighten all screws on your glass cutter as they will tend to loosen up as you use it, which will cause uneven lines.
- Patience is key. Do not rush any step of the process.
Next time, I will show you what I have done with those bottles, but in the meanwhile, happy glass cutting!