21 days ago
- The author discusses cooling solutions for hot summer days, comparing traditional air conditioners, thermoelectric coolers, and evaporative cooling, finding them unsuitable for personal use.
- A personal cooling solution using sodium sulfate decahydrate is proposed, which melts around 18°C and absorbs heat similarly to ice, but at a safer temperature for skin contact.
- A recipe includes water, sodium sulfate, table salt, optional thickener (e.g., CMC or xanthan gum), and borax to prevent settling and mold; the mixture is heated and cooled to form a gel-like substance.
- Packaging suggestions involve heat-sealed polyethylene bags, possibly partitioned, with straps for wearability; a t-shirt underneath and light shirt over the packs are recommended for comfort and sun protection.