i dunno about that she could be right of course but i dunno there's other films that i've seen and i haven't seen that have used quite a lot of blood. but if it is true color me impressed that they actually used real fake blood instead of using CGI like they seem to these days unlike it's a B film of course and this one clearly isn't.
i wonder if that is true though? i forget how much Theater of Death you know that old Vincent Price film from (1973) also you MUST see it if you haven't seen it before. they use quite a lot of blood in that one but i don't recall hearing them still taking it out the next day after it was shot to be fair.