Cov khoom siv raw ntawm cov hnab looj tes canvas yog canvas, uas muaj npe tom qab nws tau pib siv los ua phuam. Cov canvas yog woven nrog ntau txoj xov, yog li ntawd qhov kev ntxhib los mos yog khov kho, hnav zoo, tsis haum thiab tuab. Canvas hnab looj tes manufacturers nco koj kom them sai sai rau cov ntsiab lus nram qab no thaum ntxuav cov hnab looj tes canvas: Tsis txhob tiv tauj nrog cov kua qaub, alkali, ntsev thiab lwm yam tshuaj kom tsis txhob xeb thiab deformation. Thaum tu cov ntaub thaiv chaw ua hauj lwm tiv thaiv hnab looj tes, lub zog yuav tsum maj mam thiab txawm tias. Tsis txhob siv dag zog txhuam txhuam, kom zam zam lub sijhawm luv. Zam kev tiv tauj nrog cov hnab looj tes tiv thaiv lub zog cov hnab looj tes thiab cov khoom ntse kom tiv thaiv khawb.
Rau cov hnab looj tes dawb ua hauj lwm hnab looj tes, tsis txhob sib chwv nrog cov khoom uas tsis yooj yim los ntxuav, xws li xim number case. Tom qab ntxuav cov canvas ntawm cov xim no, siv cov tshuaj txhuam hniav los yog hmoov dawb dawb. Them sai sai rau kev sib koom ua ke, thiab tom qab ntawd cia nws qhuav kom tiv thaiv tsis pom kev. Lossis nrhiav ob daim ntawv dawb huv thiab npog lawv, qhuav lawv thiab rhuav lawv. Nws tseem tuaj yeem tiv thaiv kev tshem tawm.
Cov hnab looj tes cov hnab looj tes feem ntau yog siv sab nraum zoov. Tom qab cua, nag thiab kis, nws yog ib qho yooj yim rau kev puas tsuaj ntawm cov canvas, yog li canvas txij nkawm yog qhov tsim nyog. Tom qab cov canvas tau qias neeg, ntxuav nws thiab cia nws qhuav lawm. Tsis txhob raug tshav thiab kub ci, thiab zam kev daws teeb meem acid thiab alkaline. Thaum tu cov hnab looj tes cov hnab looj tes canvas ntawm cov chaw tsim khoom, xyuam xim kom tsis txhob muaj kev sib ntaus sib tua ntau, thiab xov tawg thaum txhuam. Rau cov ntaub thaiv dawb, tsis txhob los sib cuag nrog cov khoom kom yooj yim los ntxuav, xws li cov number case. Tom qab ntxuav cov canvas ntawm cov xim no, siv cov tshuaj txhuam hniav los yog hmoov dawb dawb.