ʻO ke melemele Chrome, i ʻike ʻia ma ke ʻano kemika ʻo lead chromate (PbCrO₄), he pigment ʻālohilohi a olaola i kaulana no kona kala ikaika. I hana mua ʻia i ka makahiki 1809 e ke kemika Farani ʻo Louis Nicolas Vauquelin, ua loaʻa koke ka kaulana ma ke ʻano he koho kūpono no nā pigment melemele kuʻuna e like me ka orpiment. Loaʻa ka inoa o ka pigment mai ka chromium, ka mea i ʻike ʻia i ka wā o nā hoʻokolohua a Vauquelin ma ka mineral crocoite, kahi kumu kūlohelohe o ka lead chromate.
ʻO ka hana ʻana o ka melemele chrome e pili ana i kahi kaʻina hana hoʻoheheʻe kemika. Hoʻopili nā paʻakai kēpau me nā hui chromate a i ʻole dichromate i loko o kahi hopena wai, e hana ana i nā ʻāpana liʻiliʻi o ka chromate kēpau. Ma ka hoʻoponopono ʻana i nā kūlana hopena, hiki i nā mea hana ke hana i nā aka like ʻole, mai ka melemele primrose palupalu a i nā ʻalani hohonu a momona. ʻO nā nui ʻāpana liʻiliʻi e hua mai i nā waihoʻoluʻu māmā, ʻoiai nā ʻāpana nui e hana i nā leo ʻeleʻele. No ka hoʻonui ʻana i ke kūpaʻa a me ka hana, hoʻopili pinepine ʻia nā hana ʻili, e pale ana i ka pigment mai ka hōʻino ʻia o ke kaiapuni.
Ka manawa hoʻouna: Iune-13-2025