First test of my DIY fire retardant. Mix was 9oz borax and 4 oz boric acid in 1 gallon of water. Items were coated in the solution and then left to dry overnight. Flame spreads much more readily in the untreated paper and burlap, but enough heat will char the treated samples. The block of 2x4 was hard to assess in this test, but it did seem to be less inclined to stay lit and continue smoldering.
