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Puchtler-Sweat stain

(Science: technique) For basement membranes, a staining method using resorcin-fuchsin and nuclear fast red solutions after carnoy's fixative; basement membranes are gray to black and nuclei pink to red.

For haemoglobin and haemosiderin, a complex staining method in which, on a yellow background, haemoglobin is stained red, haemosiderin blue to green and elastic fibres are pink.