William Salmon's Polygraphice (1673) provides a recipe for varnish used in etching, consisting of three ounces of virgin wax, two ounces of mastic, and one ounce of asphaltum.
wˈɪljəm sˈæmənz pˌɑːlɪɡɹˈæfɪs wˈʌn θˈaʊzənd sˈɪkshˈʌndɹɪd sˈɛvənti θɹˈiː pɹəvˈaɪdz ɐ ɹˈɛsᵻpˌiː fɔːɹ vˈɑːɹnɪʃ jˈuːzd ɪn ˈɛtʃɪŋ, kənsˈɪstɪŋ ʌv θɹˈiː ˈaʊnsᵻz ʌv vˈɜːdʒɪn wˈæks, tˈuː ˈaʊnsᵻz ʌv mˈæstɪk, ænd wˈʌn ˈaʊns ʌv ˈæsfæltəm.