This method uses glass etching cream. The hardest part is taping off where you want the marks to be. Highly recommend reviewing the directions for the etching cream.
BEFORE adding volume markings
5 gallon glass carboy
Etching Cream
Simple glass etching cream from amazon or a craft store. It takes less than 1 oz so buy the cheapest container unless you plan to etch 100 carboys.
Stencils
Same local craft store. Adhesive and re-usable, perfect for this project.
Tape it off
I simply poured in one gallon at a time and taped it off as I went. Be mindful of what angle to view your carboy from while taping. The refraction of the thick glass walls can really change how the water level appears. I recommend being eye level with the liquid while taping.
Apply the etching cream.
I use a Q-tip because I love Q-tips obviously. Instructions say it only takes 60 seconds to make a permanent mark, which I found to be quite true. I left mine on for 90 seconds and was quite happy with the results. Then, take sponge or wet cloth and soak up all the etching cream. Make sure you rinse the area very well or you can end up etching areas of glass you didn't mean to etch.
I was very happy with the results
Camera doesn't do the greatest job capturing the results, but you get the idea. They're actually incredibly clear and visible in person.
BEFORE adding volume markings
5 gallon glass carboy
Etching Cream
Simple glass etching cream from amazon or a craft store. It takes less than 1 oz so buy the cheapest container unless you plan to etch 100 carboys.
Stencils
Same local craft store. Adhesive and re-usable, perfect for this project.
Tape it off
I simply poured in one gallon at a time and taped it off as I went. Be mindful of what angle to view your carboy from while taping. The refraction of the thick glass walls can really change how the water level appears. I recommend being eye level with the liquid while taping.
Apply the etching cream.
I use a Q-tip because I love Q-tips obviously. Instructions say it only takes 60 seconds to make a permanent mark, which I found to be quite true. I left mine on for 90 seconds and was quite happy with the results. Then, take sponge or wet cloth and soak up all the etching cream. Make sure you rinse the area very well or you can end up etching areas of glass you didn't mean to etch.
I was very happy with the results
Camera doesn't do the greatest job capturing the results, but you get the idea. They're actually incredibly clear and visible in person.