My experience is with Winsor & Newton Artist’s watercolor paints in large and small pans or tubes. And, in my experience, most colors will “dry out.” Which in tube form, would be considered expired by most art stores. I’m unclear on the predictability of the shelf life of watercolor paints, but I bet each manufacturer…

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In theory, a modern split system air conditioner should never need a recharge, unless it breaks. It’s supposed to be a closed system no different from your refrigerator. Most people never hear of a standard off-the-shelf refrigerator needing a recharge. Why is that? Well, let’s talk about your fridge for a moment to help me…

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