To demonstrate Susumu’s RG’s tolerance to sulfur vapor, a contract was created with Battelle lab, a third party lab, to conduct the Flower of Sulfur Test exactly as previously described by one auto electronics-maker. A direct quote from their report shown above confirmed that there was no sign of silver sulfide after 20 days of the Flower of Sulfur test. The silver coupon, intentionally placed to prove the test’s validity, was covered with silver sulfide.