Cov txiaj ntsig thiab kev puas tsuaj ntawm lub hnub ci hluav taws xob rau tib neeg tau ntev los ntawm cov kws tshawb fawb nyob thoob ntiaj teb. Nws paub tias ultraviolet rays
sib txawv hauv wavelength thiab muab faib ua 3 hom: UVC - luv, UVB - nruab nrab ntev, UVA - ntev tshaj. UVC rays tsis ua rau muaj kev phom sij rau tib neeg, vim tias. vim qhov me me ntawm lawv cov nthwv dej, lawv tsis ncav cuag lub ntiaj teb nto, raug absorbed los ntawm ozone txheej ntawm cov cua. Lwm ob hom sib txawv ntawm cov degree thiab qhov tshwm sim ntawm cov nyhuv ntawm tib neeg daim tawv nqaij. Ntxiv nrog rau cov txiaj ntsig ntawm tshav ntuj, nyob rau hauv tus ntawm cov vitamin D yog tsim nyob rau hauv daim tawv nqaij, uas pab ntxiv dag zog rau cov pob txha cov ntaub so ntswg nyob rau hauv lub cev, kuj muaj kev pheej hmoo ntawm kev kub hnyiab, kev laus ntawm daim tawv nqaij ntxov ntxov thiab kev loj hlob ntawm melanoma (malignant qog)..
txhawm rau txo cov teebmeem ntawm cov hluav taws xob ultraviolet, cov tshuaj pleev thaiv hnub nrog PPD thiab SPF cov ntsuas tau siv, uas yog cov lim dej uas thaiv cov rays, tiv thaiv lawv los ntawm cov tawv nqaij.tawv nqaij. SPF lim tiv thaiv UV B rays, PPD lim tiv thaiv UVA rays, uas yog
yog qhov txaus ntshai tshaj plaws, vim lawv rhuav tshem collagen fibers hauv txheej dermis, ua kom cov txheej txheem kev laus, thiab tuaj yeem ua rau mob qog noj ntshav. SPF-tsuas yog cov khoom lag luam tuaj yeem tiv thaiv tshav ntuj, thaum PPD thiab SPF cov tshuaj tiv thaiv tshav ntuj muaj kev tiv thaiv zoo tiv thaiv UVA thiab UVB tshav ntuj. Cov naj npawb qhia ntawm lub ntim ib sab ntawm cov ntawv luv qhia txog qib ntawm kev tiv thaiv no. Piv txwv li, PPD 8 cream yuav cia 8 zaug tsawg dua UVA hnub ci hluav taws xob mus rau ntawm daim tawv nqaij, thiab lwm yam. Thiab tus lej SPF qhia tias koj tuaj yeem nyob hauv lub hnub ntev npaum li cas. Thaum xaiv cov tshuaj pleev thaiv hnub, koj yuav tsum coj mus rau hauv tus account koj cov duab, uas nyob ntawm cov xim ntawm daim tawv nqaij, qhov muag thiab plaub hau. Yog li ntawd, cov tawv nqaij sib dua, qhov siab dua qhov SPF thiab PPD yuav tsum yog. Lub cream kuj yuav tsum phim hom tawv nqaij. Nws yuav tsum raug sau tseg tias qhov siab dua qhov kev tiv thaiv ntawm cov khoom, lub fatter thiab thicker nws sib xws. Qhov no haum rau hom tawv nqaij qhuav. Rau qhov chaw rhiab tshaj plaws ntawm lub ntsej muag thiab lub cev nrog cov tawv nqaij nyias (pob muag, daim di ncauj, décolleté), nws raug nquahu kom siv cov khoom uas muaj kev tiv thaiv siab tshaj plaws (30-50 units). Tsis tas li, kev saib xyuas tshwj xeeb yuav tsum tau them rau feem ntau ntawm lub ntsej muag thiab lub cev, xws li lub qhov ntswg, pob ntseg, lub duav.
Raws li cov tshuaj pleev thaiv hnub nrog PPD thiab SPF yam los muab kev tiv thaiv zoo tshaj plaws, nws raug nquahu kom siv lawv tib yam li niaj zaus, 20-30 feeb ua ntej tawm mus. Thaum lub sij hawm no, cov khoom yuav absorbed rau hauv daim tawv nqaij, thiab nws yuavnpaj rau sunbathing.
Cov tshuaj pleev thaiv hnub nrog PPD thiab SPF siv rau ntawm daim tawv nqaij hauv txheej tuab dua li cov khoom tu tawv nqaij niaj hnub. Rau lub ntsej muag, qhov pom kev zoo yuav sib npaug ntawm cov kua nplaum uas haum rau ntawm lub ncoo ntawm koj tus ntiv tes, thiab rau lub cev nws yog li ntawm ob mus rau peb tablespoons.
Nws yuav tsum nco ntsoov tias txawm tias cov tshuaj pleev thaiv hnub tsis tu ncua feem ntau poob lawv cov khoom tom qab qee lub sijhawm thiab los ntawm kev ua haujlwm txhua yam. Yog li ntawd, nws yog ib qho tsim nyog yuav tau rov qab cov nplaum nplaum rau ntawm daim tawv nqaij thaum lub sij hawm tag nrho ntawm lub hnub raug - tom qab li ob teev, thiab tom qab txhua txhua da dej nyob rau hauv lub pas dej.
