Hi all,
I have down 4 batches now in plastic bottles. I made a batch and used glass bottles (bottled 2 weeks ago). I have had them stored in a nice cool room. I put one in the fridge to try it and it was close to flat. I used 2 carb drops as they are 750ml bottles, and did the same recipe I did prevously in PET bottles. Every batch the plastic bottles have been fully carbonated in just over 1 week. It has been 2 weeks and the glass bottles are still flat. I gave them all a light shake tonight. Why does glass take so long or have I done something wrong. I used a bench capper so they should be sealed tight.
How come glass take longer than plastic
Re: How come glass take longer than plastic
In theory there is no reason why PET v. glass should have different carbonation rates.
2 carb drops should be plenty for a 750 mil bottle. There are some posts where people suggest the carb drops are not a consistent size, but I think they are close enough. I don't use them, and prefer caster sugar, measured with one of those sugar measuring doovas.
Are you sure your bench capper sealed the bottles tight? It is important to set the bench capper at the lowest height setting where you can still squeeze the bottle under the capper. If it is too high, it can look like the bottles are capped properly, but they may not be as tight as they should be.
I set my capper to the lowest height possible, and I also ensure I get a slight dimple in the cap to show it is properly sealed.
2 carb drops should be plenty for a 750 mil bottle. There are some posts where people suggest the carb drops are not a consistent size, but I think they are close enough. I don't use them, and prefer caster sugar, measured with one of those sugar measuring doovas.
Are you sure your bench capper sealed the bottles tight? It is important to set the bench capper at the lowest height setting where you can still squeeze the bottle under the capper. If it is too high, it can look like the bottles are capped properly, but they may not be as tight as they should be.
I set my capper to the lowest height possible, and I also ensure I get a slight dimple in the cap to show it is properly sealed.
Re: How come glass take longer than plastic
Are the glass bottles stored much colder than the plastic ones? If they are much colder, the carbonation may be much slower.
"Not all chemicals are bad. Without chemicals such as hydrogen and oxygen, for example, there would be no way to make water, a vital ingredient in beer." - Dave Barry.
Re: How come glass take longer than plastic
My theory, Glass Colder than Plastic.......hold on whilst I duck for the Scientific version 
Other theory, the Glass ones could be 800ml (VB), Plastic ones could be less than 750ml. More sugar per ml, more CO2 per bottle.
Cheers
Boonie
Other theory, the Glass ones could be 800ml (VB), Plastic ones could be less than 750ml. More sugar per ml, more CO2 per bottle.
Cheers
Boonie
A homebrew is like a fart, only the brewer thinks it's great.
Give me a flying headbutt.......
Give me a flying headbutt.......
Re: How come glass take longer than plastic
Only reasons I can think of are:
1. they aren't sealed correctly
2. you sanitised them differently to the PET and the residue has killed the yeast
1. they aren't sealed correctly
2. you sanitised them differently to the PET and the residue has killed the yeast
w00t!
Re: How come glass take longer than plastic
The glass ones are stored where the PET bottles are.
When I bought the glass bottles, they were filled with mould. I soaked them in bleech overnight. Emptied them and rinsed well. I then scrubed and soaked them in dishwashing liquid for about a week to get rid of all the bleech. I then emptied them out, rinsed and rinsed and rinsed. They sat empty for about 2 weeks, spotlessly clean. Before bottling, I rinsed them thouroughly with santiser and let dry. I then bottled. They are not completely flat, there is a little bit of carbonation going on. There is a dimple in the lids so they are sealed (thanks I never knew that). I might wait another week and give them a shot.
When I bought the glass bottles, they were filled with mould. I soaked them in bleech overnight. Emptied them and rinsed well. I then scrubed and soaked them in dishwashing liquid for about a week to get rid of all the bleech. I then emptied them out, rinsed and rinsed and rinsed. They sat empty for about 2 weeks, spotlessly clean. Before bottling, I rinsed them thouroughly with santiser and let dry. I then bottled. They are not completely flat, there is a little bit of carbonation going on. There is a dimple in the lids so they are sealed (thanks I never knew that). I might wait another week and give them a shot.
Re: How come glass take longer than plastic
Morgans, no rinse.rwh wrote:What sanitiser did you use pre-bottling?
I think they are coming good. I have a test one sitting in my room, I gave it a shake today and a lot more bubbles are appearing. I think the theory of glass being colder is a pretty good one.