Hauv Lavxias, tsis yog li ntev dhau los, weaving ntawm bracelets los ntawm cov hlua roj hmab tau nrov. Tab sis tsis yog txhua tus niam txiv, yuav cov khoom lag luam zoo li no rau lawv cov menyuam, paub tias lawv tab tom ua kev phom sij rau lawv.
Thaum kuaj xyuas cov hlua roj hmab los ntawm lub tuam txhab British Niaj Hnub Xa Ntawv, yuav luag 40% ntawm cov flatates tau pom, uas tuaj yeem ua rau ntau yam mob viav vias, kev ua xua thiab mob cancer. yog hu ua cov tshuaj uas muab cov yas thiab roj hmab muag muag thiab tawv elasticity.
Hauv cov tebchaws nyob sab hnub poob, cov ntsiab lus ntawm cov yeeb tshuaj no raws li tus qauv yuav tsum tsis pub tshaj 10%. Hauv Lavxias, txawm li cas los xij, tsis muaj kev txwv li ntawd. Hauv EU lub tebchaws, xws li cov roj hmab roj hmab, nrog qhov tshaj tus nqi, raug txwv tsis pub muag.
Elastic band rau weaving bracelets tshwm sim hauv 2012 thiab raug tso tawm los ntawm Rainbow Loom. Nws yog cov roj hmab ntoo ntawm cov tuam txhab no tau nyab xeeb rau menyuam yaus. Tab sis thaum lub caij tam sim no, txhawm rau kom txo tus nqi ntawm cov khoom lag luam, cov khoom siv ntawm cov khoom siv tsis zoo tau pib tsim.
Ntau zaus, cov hlua khi roj hmab pib coj los ntawm Tuam Tshoj, qhov chaw uas lawv tsis muaj daim ntawv pov thawj kev nyab xeeb. Yog li cov niam txiv, txuag nyiaj ntawm cov khoom qub, nyiam cov pheej yig dua thiab ua rau lawv cov menyuam muaj kev phom sij.
Thaum muas cov khoom siv ntawm cov hlua khi rau kev khi nws tes, koj yuav tsum ua tib zoo nyeem daim ntawv ntawm lub hnab. Daim ntawv sau EU tam sim no qhia tau hais tias cov khoom yeej ua raws li kev nyab xeeb. Qhov no kuj siv rau cov khoom ua si ua los ntawm roj hmab lossis yas.
