The Chronicles of the Chronicle Flask: 2018

As has become traditional, I’m finishing off this year with a round-up of 2018’s posts. It’s been a good year: a few health scares which turned out to be nothing much to worry about, one which turned out to be a genuine danger, a couple of cool experiments and some spectacular shiny balls. So without further ado, here we go…

Things were a bit hectic at the start of this year (fiction writing was happening) and as a result January was quiet on the blog. But not on the Facebook page, where I posted a couple of general reminders about the silliness of alkaline diets which absolutely exploded, achieving some 4,000 shares and a reach (so Facebook tells me anyway) of over half a million people. Wow. And then I posted a funny thing about laundry symbols which went almost as wild. It’s a strange world.

February featured BPA: an additive in many plastics.

In February I wrote a piece about BPA (Bisphenol A), which was the chemical scare of the day. There’s always one around January/February time. It’s our penance for daring to enjoy Christmas. Anyway, BPA is a chemical in many plastics, and of course plastic waste had become – and remains – a hot topic. BPA is also used in a number of other things, not least the heat sensitive paper used to produce some shopping receipts. It’s not a harmless substance by any means, but it won’t surprise anyone to learn that the risks had, as is usually the case, been massively overstated. In a report, the European Food Safety Authority said that the health concern for BPA is low at their estimated levels of exposure. In other words, unless you’re actually working with it – in which case you should have received safety training – there’s no need to be concerned.

In March I recorded an episode for the A Dash of Science podcast, and I went on to write a post about VARD, which stands for Verify, Author, Reasonableness and Date. It’s my quick and easy way of fact-checking online information – an increasingly important skill these days. Check out the post for more info.

April ended up being all about dairy and vitamin D.

April was all about dairy after a flare-up on Twitter on the topic, and went on to talk about vitamin D. The bottom line is that everyone in the UK should be taking a small vitamin D supplement between about October and March, because northern Europeans simply can’t make vitamin Din their skin during these months (well, unless they travel nearer to the equator), and it’s not a nutrient we can easily get from our food. Are you taking yours?

May featured fish tanks, following a widely reported story about a fish-owner who cleaned out his tank and managed to release a deadly toxin that poisoned his entire family. Whoops. It turns that this was, and is, a real risk – so if you keep fish and you’ve never heard of this before, do have a read!

In June I wrote about strawberries, and did a neat experiment to show that strawberries could be used to make pH indicator. Who knew? You do, now! Check it out if you’re looking for some chemistry to amuse yourself over the holidays (I mean, who isn’t?). Did you know you can make indicators from the leaves of Christmas poinsettia plants, too?

Slime turned up again in July. And December. And will probably keep on rearing its slimy head.

July brought a subject which has turned up again recently: slime. I wrote about slime in 2017, too. It’s the gift that keeps on giving. This time it flared up because the consumer magazine and organisation Which? kept promoting research that, they claimed, showed that slime toys contain dangerous levels of borax. It’s all rather questionable, since it’s not really clear which safety guidelines they’re applying and whether they’re appropriate for slime toys. Plus, the limits that I was able to find are migration limits. In other words, it’s not appropriate to measure the total borax content of the slime and declare it dangerous – they should be looking at the amount of borax which is absorbed during normal use. Unless your child is eating slime (don’t let them do that), they’re never going to absorb enough borax to do them any harm. In other words, it’s a storm in a slimepot.

August was all about carbon dioxide, after a heatwave spread across Europe and there was, bizarrely, a carbon dioxide shortage which had an impact on all sorts of things from fizzy drinks to online shopping deliveries. It ended up being a long-ish post which spanned everything from the formation of the Earth, the discovery of carbon dioxide, fertilisers and environmental concerns.

September featured shiny, silver balls.

In September I turned my attention to a chemical reaction which is still to this day used to coat the inside of glass decorations with a thin layer of reflective silver, and has connections with biochemistry, physics and astronomy. Check it out for some pretty pictures of silver balls, and my silver nitrate-stained fingers.

In October I was lucky enough to go on a ‘fungi forage’ and so, naturally, I ended up writing all about mushrooms. Did you know that a certain type of mushroom can be used to make writing ink? Or that some mushrooms change colour when they’re damaged? No? You should go back and read that post, then! (And going back to April for a moment, certain mushrooms are one of the few sources of vitamin D.)

Finally, November ended up being all about water, marking the 235th anniversary of the day that Antoine Lavoisier formally declared water to be a compound. It went into the history of water, how it was proven to have the formula H2O, and I even did an experiment to split water into hydrogen and oxygen in my kitchen – did you know that was possible? It is!

As December neared, the research for my water piece led me to suggest to Andy Brunning of Compound Interest that this year’s Chemistry Advent might feature scientists from the last 24 decades of chemistry, starting in the 1780s (with Lavoisier and Paulze) and moving forward to the current day. This turned out to be a fantastic project, featuring lots of familiar and not quite so-familiar scientists. Do have a look if you didn’t follow along during December.

And that’s it for this year. I hope it’s been a good one for all my readers, and I wish you peace and prosperity in 2019! Suggestions for the traditional January Health Scare, anyone? (Let’s hope it’s not slime again, I’m getting really tired of that one now…)

Like the Chronicle Flask’s Facebook page for regular updates, or follow @chronicleflask on Twitter. All content is © Kat Day 2018. You may share or link to anything here, but you must reference this site if you do.

If you enjoy reading my blog, please consider buying me a coffee (I promise to use a reusable cup) through Ko-fi using the button below.
Buy Me a Coffee at


It’s June 8th: please go and vote

Dear non-British readers: apologies, this may not be very relevant to you. But it’s important, so I’m writing it anyway. I’m sure you will forgive me just this once. I promise normal service will resume once all the fun and games are over.

Right, who’s still with me? Brilliant. Here we go.

Thirteen years ago, the late Sir Terry Pratchett wrote in his novel, Going Postal:

“What kind of man would put a known criminal in charge of a major branch of government? Apart from, say, the average voter.”

Like much of his writing, it’s hilarious with an aftertaste of tragic. Because, well, you don’t need me to tell you because. But everyone should read Going Postal, and then its sequel, Making Money (published in 2007 and therefore written before the stock markets crashed) if for no other reason than to marvel at Pratchett’s apparent prescience.

Anyway, why am I bringing this up? I’m bringing this up because it’s election day in the U.K. today – June 8th 2017.

Unlike Pratchett’s fictional Ankh Morpork (where there is famously a “one man, one vote” democracy – Lord Vetinari is the man, and he has the vote) in the U.K. everyone has a vote. Well, more or less. Everyone over the age of 18, who’s previously registered to vote and… (etc). Nearly everyone, anyway. Probably everyone reading this.

But weirdly, a lot of people don’t use that privilege. In 2015 just two thirds of people who were eligible to vote actually went and did it. If all, or even most, of those people voted for one particular party, it actually could change the outcome of an election.

Turnout amongst 18-24 year-olds was particularly low. In 2015 it was 43%, whereas turnout for people over 65 was 78% – approaching double.

And this, if you’ll excuse the phrase, is really arse-backwards, isn’t it? Because it’s those younger people who are going to have to live with the consequences of whatever decision is made for the longest amount of time. They absolutely SHOULD have their say.

So, this is my point: please, GO AND VOTE. I don’t care what you have to say, I just want you to have a say.

And finally, in case it’s helpful, here’s a really quick summary of the key scientific and technology-related policies of the Conservatives, Labour and Liberal Democrats, which I’ve condensed from this page at (do go and read the whole thing). The party names at the start of each bulletin point link to their respective manifestos:

  • CONSERVATIVES – more spent on research and development, especially batteries and electric vehicles. New police infrastructure to deal with cybercrime. By 2020 every home and business will have high-speed broadband, with 5G rolling out by 2022. There will be new institutes of technology in every major city in England. The UK’s shale gas industry (i.e. fracking) will be developed and legislation created for plans to extract the gas. Emissions will be reduced by 80% (compared to 1990 levels) by 2050.
  • LABOUR – A “science innovation fund” will be created with a specific aim to protect the environment. Labour will “reintroduce effective judicial oversight” of surveillance powers” (i.e. the IP Act). Plans to roll out “universal superfast broadband” by 2022 and create “uninterrupted” 5G coverage. Fracking will be banned, renewable energy technologies will instead be favoured. Air pollution will be addressed by means of a “Clean Air Act”.
  • LIBERAL DEMOCRATS – Will fight to retain academic grants from the EU and protect science budgets. “Supported investment” for energy storage and other technologies. Surveillance powers to be rolled back. All properties in the UK will have 30 Mbps download speed by 2022 and an upload speed of 6 Mbps, with an unlimited usage cap. New centres for innovation will be created. Diesel cars and small vans will be banned from sale by 2025. Will oppose fracking. Greenhouse gas emissions to be reduced by 80% by 2040, net greenhouse gas emissions to be zero 10 years later.

GO AND VOTE (have I already said that?)

See you on the other side. Here’s a picture of a cat. Cats are nice.