The practical version of Temperature indicator cards is three sentences long. The rigorous version is three pages and reaches the same conclusion with the conditions attached.
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Topic summary
[2026 update] Temperature indicator cards: worth asking for?
This is a generated summary. It shows the 5 most-liked posts from a topic of 27, in their original order, with the accepted answer included where one exists. It is a reading aid and it will miss nuance — the full topic is the record.
v.milanovi, post #5: On the opening post — agreed on the reasoning, with one qualification. Having read the whole Temperature indicator cards thread before replying: the question in the first post has not actually been answered yet, and three of us have answered a nearby one instead. Go to post
Where I would push back on the Temperature indicator cards consensus is the confidence, not the direction. The direction looks right. The confidence is borrowed.
n.bridgewater, post #7: Split shipments reduce single-point risk and increase the number of transits. Which trade is right depends on what you are protecting against. The step people skip is the one I have spelled out. Go to post
Where a supplier reships after a documented failure without argument, that is commercially costly and worth recording alongside everything else.
That is the honest state of it as of this week.
mira.patel, post #13: Peak periods and public holidays affect this more than any other factor and are entirely predictable in advance. The general answer and the answer for your case may diverge here. Go to post
I read post #17 twice before replying, because I had assumed the opposite.
The number people quote for Temperature indicator cards is a central estimate presented without its interval, and the interval is wide enough that the estimate is nearly uninformative on its own.
Delivery to an address where somebody is present is worth more for cold-chain material than any packing decision available to the supplier.
I would put the burden of proof on the interesting explanation, not the dull one.
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