Some cake "luster dusts" are safe to eat—others are definitely not.
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You may want to avoid cakes decorated with “luster dust” (because lead and copper don't make great frosting) News
Susan Keatley (@KeatleySusan) / X
Cake decorating dust leads to toxic metal poisoning, birthday, glitter, cake, metal poisoning
Prisha India Craft 100% Pure Copper Dinner Plate - DIAMETER 12 INCH- Traditional Kitchen Special Thali Plate For Home Decorative Restaurant Ware Hotel - CHRISTMAS GIFTS: Dinner Plates
バースデーケーキのデコレーション」が原因で子どもたちが重金属中毒になってしまう - GIGAZINE
Beth Mole Ars Technica
Cake decorating dust leads to toxic metal poisoning, birthday, glitter, cake, metal poisoning