Natural coloration also affects how stains appear. A stain won’t have much effect on very dark wood species like ebony, but the same stain can have a dramatic effect on a blond one like pine or ...

Metallic salts in chemical stains react with the calcium hydroxide to produce color. Most water reducers or air-entraining admixtures will not have a dramatic effect on the final stain appearance.

Similarly, over half of those who have experienced stains have felt embarrassed, anxious and ashamed, with more than a quarter saying they do not feel comfortable talking openly about periods.