Ntchito:

Nitric acid ndi chinthu chofunikira choyambitsa kupanga feteleza ndi mankhwala. Nitric acid imagwiritsidwa ntchito pofuna kusungunula ndi matayala
Mafuta olemera, omveka bwino kapena achikasu pang'ono ndi oopsa kwambiri ndipo amayambitsa kuwotcha kwambiri ndi khungu. Zinapangidwa ndi distillation ya alkali nitrate yophatikizidwa ndi sulfuric acid. Kuphatikiza kwa Nitric ndi sulfuric acid adagwiritsidwa ntchito kusinthitsa thonje momveka bwino kwa cellulose nitrate. Nitric acid idagwiritsidwa ntchito mu katenthedwe kambiri monga chowonjezera cha zotupa zamphamvu zolimbitsa thupi kuti zithandizire mtundu wa zikwangwani za Ambrotypes ndi Ferrotypes. Zinawonjezedwanso kutsitsa pH ya kusamba siliva kusamba mbale. Kuonjezera asidi kusamba kwa siliva wopangidwa ndi ma collodion omwe sangalandire kuwala, komwe kunali kopindulitsa kwa kuchepetsa kupezeka komwe si chithunzi.