Oily contamination you would include whatever black substance the slow roasted goulash had solidified into?
If it's black, it's probably got a fair bit of pyrolised carbohydrate and protein in the mix, but bound with polymerised fats. It's a primitive carbon fibre composite 🙂
@gbj_tester started
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Oily contamination you would include whatever black substance the slow roasted goulash had solidified into?