Right, bit of a long, strange ride here.
I was given a large haul of old, Kilner brand preserving jars about 2 years ago by an old lady. My partner and I were making plum jam and we desperately needed jars and so we put out the call on a local social-media platform and this lady answered. She told us she no longer had any use for them and was happy for them to go to a good home.
The jars, which were in three different form factors, came with an unsorted jumble of rubber sealing rings, screw caps, glass lids and the like. It took us quite a while to find matching sets for the jam but, when we did, they performed perfectly.
We are still using the jars regularly, both as a way to keep dried ingredients (beans, pulses, sugar, flour) fresh and as a way to pickle/can/store produce and preserves. This year, partly buoyed by the PEP curriculum, I have been doing a lot of foraging and we dug out our surplus jars to store up some jams. Whilst doing so, I got frustrated at how hard it was to match lids to jars, find the correct screw caps, etc., so I decided to inventory our collection and to mark them up with different colours as a quick and easy, visual key.
Task One: take stock of jars and mark them with coloured paint to easily find sets.
Identifying the jars and their components took some time but was, all-in-all, very satisfying. I noticed that we were lacking screw caps and seals for some of our jars and so decided to do some research into what types of jar we had, so that I could buy replacements. Enter the rabbit hole...
Task Two: identify vintage Kilner jars.
This learning exercise was much deeper than I expected. I eventually found some resources
online, although nothing easy to use or coherent. It was obvious that we had Kilner Original, Kilner Improved and some more modern Kilner jars - that much was moulded into the glassware - but I hadn't realised that some of our jars dated from the 1930s and that replacements were very difficult to come by. Some of the jars also lacked the identifying features and it took a while longer to categorise them.
Our "more modern" jars, which mostly dated from the 1960s and 1970s, were also confusing as the lids, which seemed to fit all of them, could not be secured on some of the later types.
I was still missing screw caps to secure many of our jars and, whilst I had found a few replacements online, they were either cripplingly expensive or inaccurately labelled. I actually purchased a few that didn't fit at all. Very frustrating. I decided it would be worth measuring the jars to be sure I didn't waste any more time and money.
Task Three: measure and illustrate jars.
As I couldn't find a resource with all of the jar measurements, I decided to create my own. I sat down, one Sunday, and measured, photographed and drew out all of the jars in my collection. Later, I actually acquired a few more to fill in some of the gaps in my "encyclopedia".
I now had a collection of measurements that would allow me to buy replacement screw caps, lids and seals with confidence. Further, I knew what components would fit each type of jar. I was also pretty confident that I could make up some tooling to create my own seals from sheets of natural rubber - I've not done that yet but I would like to in the future.
Task Four: publish measurements online.
After all of that work, I wanted to share it. Hopefully someone else in the same situation would find my resource and save themselves a bit of time or money. Some of the measurements are so detailed that it might even be useful for someone making replicas or replacement parts.
As a computer developer by trade (or one of my trades, I guess), the obvious choice was to publish the resource as a website.
I spent quite a long time making the site, adopting something of a home-made style with wonky illustrations, cursive text and the like. It's not a style that I've used before and I enjoyed the process immensely.
You can see (and hopefully use) it by clicking the link below:
Vintage Kilner Jars Website
All of the illustrations are drawn by me. I've not made vector graphics like that before and I had to learn the process beforehand. I used
Inkscape, an open-source program that I will definitely be using in the future.
All of the photographs and measurements are also my own.
The website includes the following functionality:
Timeline of Kilner jar typesDetailed measurements and information for identifying jarsPhotographs and illustrationsTable of measurements for making replacement sealing rings
Further work
I intend to continue this crazy venture, a little further. I want to create a 3d, printable model of the various screw caps so that people can print them at home (or via an online 3d printing service), rather than relying on expensive, dwindling spares. I would also like to improve and add to the illustrations on the website as I'm still, very much, a novice.
Conclusion
All in all, I think I have spent about
25 hours on this project. Making a website and the illustrations, the latter which took some learning, was quite time consuming. Taking the measurements themselves was also surprisingly long-winded and I sunk about 5 hours into that alone.
I hope to have created a useful resource for others. At the very least, I learned some skills (illustration, mostly) and organised my own jar collection.