Ngā Tikanga Tirotiro
Ngā tikanga whakamātautau mō te ātete ki te ru wera me te pakari o ngā ipu karāhe; GB/T 4548 tikanga whakamātautau me te whakarōpūtanga mō te ātete ki te waikura o te mata o roto o te ipu karāhe; Ngā rohe whakaaetia o te whakarewa mata, cadmium, arsenic me te antimony i roto i ngā ipu karāhe; 3.1 paerewa kounga mō ngā pounamu karāhe
Whakamātautau Kaha
Me whakahaere te pounamu porowhita kia rite ki ngā whakaritenga o te GB/T 6552. Tīpakohia te wāhanga ngoikore, te wāhanga pā rānei o te tinana o te pounamu mō te pānga. Ka taea te whakahaere i te whakamātautau momo mā te whakatauira i te tukinga whakaputa, te kimi rānei i runga i te mīhini.
Tirotiro Tauira
Tuatahi, tatauhia te maha o ngā mōkihi i tangohia kia rite ki te 5% o te tapeke o ngā mōkihi i roto i tēnei puranga taonga: kotahi hautoru o te maha o ngā mōkihi e hiahiatia ana i tīpakohia matapōkeretia mai i mua, waenganui me muri o ia waka, ā, 30%-50% o ngā mōkihi i tīpakohia matapōkeretia mai i ia mōkihi hei tirotiro i te āhua.
