Ka whakamahia hei kaihoko whakawhiti-hononga whai hua mo te whakapiri kararehe, a ka taea te whakanui ake i te pokey o te kāpia kararehe.Ka whakamahia ano hei rongoa rongoa mo nga taapiri urea-formaldehyde.Ko te tere whakaora o te 20% wairewa wai he tere ake.
1. Ka whakamahia hei kaihoko rahi pepa i roto i te umanga pepa hei whakarei ake i te aukati wai me te koretake o te pepa;
2. I muri i te rewa i roto i te wai, ka taea te whakakotahi i nga matūriki pai me nga matūriki colloidal taiao i roto i te wai ki roto i nga flocs nui, ka taea te tango mai i te wai, na reira ka whakamahia hei coagulant mo te tuku wai me te wai para;
3. I whakamahia hei purenga wai turbid, i whakamahia ano hei precipitant, fixative, filler, etc. I whakamahia hei rauemi mata mo nga whakapaipai antiperspirant (astringent) i roto i nga mea whakapaipai;
4. I roto i te ahumahi whakamarumaru ahi, ka hangaia he kaipatu ahi pahuka me te houra tunutunu me te kaihoko pahuka;
5. Reagents tātari, mordants, tanning agents, grease decolorants, rakau tiaki;
6. Te whakapumau mo te mahi albumin pasteurization (tae atu ki te wai, tio ranei nga hua katoa, te ma, te hua hua manu ranei);
7. Ka taea te whakamahi hei rauemi mata mo te hanga kohatu horihori, te haukinia alum teitei, me etahi atu konumohe;
8. I roto i te ahumahi wahie, whakamahia te reira rite te precipitant i roto i te hanga o chrome kōwhai me te roto waikano, a i te wa ano e whai wāhi ki te whakatika me te whakakī.
