925 Na Lai kala

ʻO nā kāhiko kālā ka mea maʻamau i kūʻai ʻia e nā kānaka. Mai nā kūpeʻe lima, nā apo, nā apo pepeiao i nā mea hoʻohiwahiwa, nā pendants, a me nā mea ʻē aʻe, hiki iā ʻoe ke ʻike i nā mea hoʻonaninani kālā e ʻaʻahu ʻia ana i nā manawa kūikawā a me nā manawa maʻamau. ʻO nā mea hoʻonaninani kālā he makana maikaʻi i ka lā hānau a me ka makahiki.

Ma ʻAmelika Hui Pū ʻIa, ua ʻōlelo ka US Federal Trade Commission (FTC) ʻaʻole hiki ke kūʻai ʻia ke kālā e like me ke kālā, ke kālā sterling, sterling, ke kālā paʻa, a i ʻole me ka pōkole Ster., ke ʻole he 92.5% kālā maʻemaʻe. Akā, he aha kēia kālā 925? No ke aha e pono ai ke kūʻai i ke kālā o kēia papa?

He aha ?

ʻO ke kālā maʻemaʻe (99% kālā) he malleable, ductile, a palupalu loa. ʻO kona palupalu ka mea maʻalahi e hana pū me. Eia nō naʻe, maʻalahi nō hoʻi ia e ʻohi. Ma kona ʻano maʻemaʻe, ʻo ke kālā he metala hanohano a ʻoi loa ke kumukūʻai.

Eia nō naʻe, no ka ʻohi maʻalahi ʻana, ʻaʻole kūpono ia e hana i nā mea hana. I loko o hoʻokahi a ʻelua paha hoʻohana, hoʻomohala ʻia kahi hiʻohiʻona grazed a deformed. No laila, hoʻokumu ʻia kahi hui kālā.

Hoʻohui ʻia ka 92.5% o ka metala kālā me 7.5% metala keleawe e loaʻa ai ke kālā 925 sterling. Hāʻawi ka 7.5% keleawe i ke kālā i ka ikaika e pono ai. No ka mea he 7.5% keleawe wale nō i hoʻohui ʻia, me 92.5% koena o ke kālā, mālama ʻia ka ductility a me ka nani o ka metala kālā.

Ma waho aʻe o ke keleawe, hiki ke hoʻohui ʻia nā metala ʻē aʻe e like me germanium, platinum, a me ka zinc i ke kālā e hana ai i ke kālā sterling. Eia nō naʻe, e pili ana i nā kūlana o ka ʻoihana, ua hoʻomākaukau ʻia ke kālā sterling 925 wale nō ma ka hoʻohui ʻana i nā metala keleawe.

ʻAʻole i like ke kumukūʻai o ke kālā 925 sterling e like me ke kālā maʻemaʻe a hiki ke kūʻai aku. Hoʻohana ʻia ia e hoʻomākaukau i nā ʻano mea kālā like ʻole e like me nā apo pepeiao, nā lei, nā apo, nā apo ihu, nā kūpeʻe lima, nā kuʻekuʻe wāwae, etc.

ʻOi aku ka lōʻihi a me ke kūpaʻa o ka mea i loaʻa ma mua o nā kāhiko kālā maʻemaʻe. Eia kekahi, i ka wā i hoʻokomo ʻia ai nā pōhaku makamae i loko, e piʻi aʻe kona waiwai.

E ʻike ʻoe i kekahi mau brick kaulana a me nā hale kūʻai pūnaewele e kūʻai aku ana. Hāʻawi lākou i nā mea kūʻai nui e ʻimi ana i nā mea kūʻai kūpono.

ʻO ka manawa pinepine, loaʻa ke kālā kālā 925 i loaʻa i kahi kumukūʻai haʻahaʻa. Loaʻa nā ʻano hoʻolālā like ʻole a inā ʻaʻole ʻoe hauʻoli, hiki iā ʻoe ke hana i kāu mau mea nani i hana ʻia e like me kou makemake a me kou makemake.

ʻO ka metala kala e like me ke gula, he metala hanohano ʻaʻole ia e hoʻoheheʻe a hoʻoheheʻe ʻia ke hoʻopili ʻia me nā sulfide i ka lewa. Eia nō naʻe, ʻoiai ʻo ka mea kūʻai a mākou e kūʻai ai he , mai poina iā mākou he keleawe.

ʻO nā metala e like me ke keleawe, ka zinc, a me ka nickel e hoʻoneʻe ʻia e nā sulfides i ka lewa a pōʻeleʻele. ʻO ka oxidation o ke keleawe i loko o nā mea nani e hoʻopōʻeleʻele ai ka ʻāpana kālā a ʻeleʻele ma hope o kekahi manawa. ʻO ka melemele ʻana o ke kālā he hopena hiki ke hoʻihoʻi ʻia, a hiki ke hoʻihoʻi ʻia ka ʻulaʻula ma ka poli ʻana i ka metala.

No ka hoʻohaʻahaʻa ʻana i ka melemele o kāu mau mea hoʻonaninani kālā, e mālama i nā mea nani mai kahi ʻūlū a pulu. Hiki ke hana ʻia kēia ma ka mālama ʻana iā lākou i loko o nā pahu hau a i ʻole nā ​​ʻeke pale ʻino.

Eia kekahi, ma hope o kēlā me kēia hoʻohana, hoʻomaʻemaʻe iā lākou me kahi lole. Loaʻa iā ʻoe nā lole hoʻomaʻemaʻe kūikawā no ia mau hana, ʻoi aku ka maikaʻi ma mua o nā lole maʻamau. Hiki nō hoʻi iā ʻoe ke hoʻohana i nā mea hoʻomaʻemaʻe mea hoʻomaʻemaʻe kālā a i ʻole ka poni kālā i hana ʻia e hoʻihoʻi i ka nani i kēlā me kēia manawa.

Ua ʻaʻahu nā kānaka i nā kāhiko kālā mai 900 BC. kūpono no nā mea a pau me ka nānā ʻole i ka makahiki a i ʻole ke kāne. ʻAʻole hele i waho kona ʻano hoʻopiʻi maʻamau! ʻO ke kālā 925 kahi maʻamau i hoʻonohonoho ʻia e nā mea hana e hōʻike i ke kālā maikaʻi loa. No laila, i ka manawa aʻe e hele ai ʻoe e kiʻi i nā mea kala kala e hoʻomaopopo ʻoe ʻo ia!