Tar yog cov khoom lag luam "hlawv". Nws tau txais los ntawm ntoo, thee los ntawm muaj zog tiv thaiv cua kub yam tsis muaj kev nkag mus rau huab cua. Nws muaj cov resins, benzene, cresol, xylene, creosote, guaiacol, toluene, phenol thiab lwm yam tshuaj. Nws tuaj yeem ua kom yaj hauv cawv thiab alkalis, tab sis nws dissolves tsis zoo heev hauv dej. Hauv Lavxias, tar yog tau los ntawm ntau hom ntoo, feem ntau yog los ntawm birch thiab linden, hauv Asmeskas - los ntawm cov thee, hauv Finland - los ntawm ntoo thuv. Lawm, txhua hom tau nws tus kheej ua haujlwm. Yog tias koj xav tau linden tar ntawm koj tus kheej, tom qab ntawd nce cov ceg ntoo lossis cov tawv ntoo ntawm linden thiab qhuav kom zoo.
Cov Lus Qhia
Kauj ruam 1
Npaj cov hlau nrum nrog ntim ntawm 8-10 litres. Ua ib lub qhov hauv nws lub qab nrog txoj kab uas hla ntawm 2-4 cm kom cov distillation khoom tawm los. Tso cov hlau nrum hauv ib cov kua ntses, lo qhov chaw ntawm lawv cov kev sib cuag zoo nrog av nplaum, ua tiav nruj ntawm lawv cov kev sib txuas. Nthuav cov ntoo hauv cam khwb cia hlau (ntau npaum li cas yuav haum), thiab npog nrog yias frying ntawm qhov tsim nyog loj, txhuam cov npoo nrog av nplaum ib yam nkaus. Tom qab ntawd faus lub lauj kaub ua ke nrog qis qis dua ntawm cov cam khwb cia hlau hauv av. Tso tus luj txog 30 kg hauv yias.
Kauj ruam 2
Ua kom muaj qhov kub ntxhov nyob ib ncig ntawm lub cam khwb cia hlau thiab tuav nws li 2-3 teev. Thaum rhuab, cov kab nrib pleb yuav tshwm sim rau hauv av nplaum, npog lawv txhua lub sijhawm. Tom qab lub sijhawm txhua lub sijhawm, qaij tawm qhov hluav taws kub thiab ua tib zoo khawb tawm cov cam khwb cia hlau nrog rau yias.
Kauj ruam 3
Cov tar yuav tsum ntws mus rau hauv lub lauj kaub, ua tib zoo muab nws pov rau hauv lub khob zaub mov, muab khi kom zoo kom tsis txhob poob ntawm cov tshuaj tsis huv. Nrog rau hom no, koj tuaj yeem tau txais 200 g ntawm tar.
Siv cov thev naus laus zis no, koj tuaj yeem tau tar ntawm birch tawv ntoo (tawv ntoo).
