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title: "Timeline photos Charles Platt has a great write-up on Sparks Brain…"
date: 2025-10-07
source: facebook
type: Archer T. Ships added a new photo.
---

# Timeline photos Charles Platt has a great write-up on Sparks Brain…

*October 7, 2025 · Facebook*

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![](img/2025-10-07-fb-002-img01.webp){style="max-width:100%; margin:1em 0"}
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Charles Platt has a great write-up on Sparks Brain Preservation and the use of chemical fixation as an alternative to cryopreservation:\
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\"For many decades, cryonics organizations have relied upon one basic principle to achieve tissue preservation: They have reduced the patient's temperature. According to the Arrhenius Equation (which is easily found online, if you are curious about it), all chemical reactions occur more slowly at lower temperatures. Since liquid nitrogen is cheaply available as an industrial byproduct, and is delivered at --196 degrees Celsius, it seems ideal for the task. No refrigeration is required; just insulated containers.\
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SBP does things very differently. Unlike other organizations, it arrests biological processes by chemical fixation, which can occur above the freezing point of water. When the fixation process is complete, patients can be stored indefinitely at --20 degrees Celsius, after a graded immersion in cryoprotectants considered sufficient to prevent freezing.\"\
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Link in comments.
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