Quick trivia from the kill floor: ever wonder why the USDA inspection mark is purple and what’s in that ink? It’s an edible, food-grade dye formulated to contrast cleanly against lean and fat without resembling spoilage colors, and in our 38°F cooler it stays on the surface instead of bleeding into the tissue — anyone have the official spec sheet handy for the newer ethanol-based batches?
We keep the SDS at the stamp rack; lists ethanol + ‘shellac binder’. @OP want our vendor sheet?
That’s interesting about the purple dye! I’ve found that it really helps in distinguishing meat quality quickly, especially in a busy cooler environment. By the way, the cleanliness factor is crucial too — if residue builds up on the stamp, it can muddy those important visuals.
It’s really interesting to hear your focus on temperature and pH; i’ve found that using gradient designs in my assays gives more clear insights into optimal conditions. Just remember that sometimes small pH adjustments can significantly impact enzyme activity, so it’s worth testing a range before committing.