Review on Certified Markal Thermomelt Heat Stick For Temperature Indication, 5 Inches Length, 100°F by Alejandro White

I'm trying determine the temp of some brass that I am annealing. In theroy I get no melt at all below the specified temp. The brass pieces are smallish, so I get very little melt, but any melt tells me it's there. So over all I think it is indicating as needed. Overall it is the best method I have found yet. I will continue to use.