2,111 to 3,111 yuan. According to the query news network, the fees of third-party testing institutions mainly depend on the testing requirements, and the cost of testing reports of lampblack purifiers is 2,111 to 3,111 yuan, so the cost of third-party testing reports of Kunming lampblack is 2,111 to 3,111 yuan. Kunming, also known as Spring City, is a prefecture-level city, provincial capital, megacity and central city of central Yunnan urban agglomeration under the jurisdiction of Yunnan Province.