Lub ntsiab ntau yam ntawm siv lead ua thiab lawv qhov sib txawv

Cov txheej txheem:

Lub ntsiab ntau yam ntawm siv lead ua thiab lawv qhov sib txawv
Lub ntsiab ntau yam ntawm siv lead ua thiab lawv qhov sib txawv
Anonim

Crystal yog cov tshuaj sib xyaw ntawm barium oxide lossis txhuas oxide nrog iav. Cov khoom no yog siv rau kev tsim khoom ntawm ntau yam tais diav. Cov hmoov txhuas ua kom lub zog ntawm iav, ua rau nws qhov ntom ntom, tiv taus lub cev puas tsuaj.

keeb kwm me ntsis

keeb kwm ntawm siv lead ua pib thaum xyoo pua 17th hauv tebchaws Askiv. Ces Vajntxwv Yakhauj kuv txwv tsis pub sawv daws siv ntoo hauv kev lag luam. Raws li nws tsab cai lij choj, yuav tsum tso tseg kev siv cov khoom siv raw li no.

muaj nuj nqis qib ntawm crystal
muaj nuj nqis qib ntawm crystal

Kilns pib rhuab nrog thee. Ib tug ntawm cov masters G. Ravenscroft, uas ua hauj lwm nrog iav, tau sau tseg tias cov tais diav nyob rau hauv lub qhov cub los ua pob tshab. Nws txuas ntxiv sim thiab tau txais cov khoom siv tshiab - siv lead ua. Qhov no tshwm sim xyoo 1676.

Crystal qib

Tus yam ntxwv ntawm cov khoom no yuav nyob ntawm nws qib. Xav txog lawv:

  1. Ib yam muaj txiaj ntsig ntawm siv lead ua yog Bohemian, cov khoom muaj iav, uas yog tsim los ntawm calcium, potassium. Tsis tas li ntawd, barium yog siv los hloov cov hlau lead hauv qhov no.
  2. Yog tias lub iav ua ke nrog barium, thaum qhov kev faib ua feem ntawm cov khoom yuav tsawg kawg yog 18%, ces koj tuaj yeem tau txais qhov hu ua bariumCrystal yog ntau hom.
  3. Yog hais tias muaj pes tsawg leeg tsis muaj ntau tshaj 24% txhuas, ces nws feem ntau hu ua low-lead.
  4. Nyob rau qib classic ntawm siv lead ua, cov hmoov txhuas tsis ntau tshaj 30%.
ntau yam siv lead ua
ntau yam siv lead ua

Tseem muaj pob zeb siv lead ua, tab sis nws tsis muaj dab tsi ua rau iav. Cov khoom siv no yog ib qho ntawm ntau hom quartz. Pob zeb siv lead ua tsis yog siv los ua cov khoom siv rau kev tsim khoom ntawm tableware. Hom crystal no muaj nuj nqis heev. Nws yog siv los ntawm jewelers los ua cov hniav nyiaj hniav kub.

Nws yuav tsum raug sau tseg tias ntau tus neeg txhawj xeeb tias cov khoom siv lead ua zoo li no tuaj yeem ua rau tib neeg noj qab haus huv, vim nws muaj cov hmoov txhuas. Txawm li cas los xij, tsis tas yuav ntshai qhov no, txij li tom qab ua tiav cov khoom no poob tag nrho cov khoom lom.

Pom zoo: