StainMatrix
Stain category
Biological Stains
Protein stains come from biological sources — blood, sweat, milk, and similar fluids. The critical rule: cold water only. Heat above 40°C causes the proteins to coagulate and permanently bond to fibres.
Key rule
Cold water always. Enzyme detergent for set stains. Never heat until clean.
5 stains in this category
The chemistry behind biological stains
Protein stains contain amino acid chains that denature and coagulate above 40°C, permanently cross-linking with fabric fibers — which makes cold water the single most critical first step. Enzyme-based cleaners (proteases) chemically sever the peptide bonds in the protein structure, dissolving the stain from the fiber without mechanical damage.
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