positive emulsion是什么意思

网络释义

1)positive emulsion,正性乳剂2)direct positive emulsion,直接正性乳剂3)orthochromatic emulsion,正色乳剂4)fast emulsion,快性乳剂5)acid emulsion,酸性乳剂6)emulsion base,乳剂性基剂

Gold plays a very important rule in the pre-fogging process of the direct positive emulsion.

直接正性乳剂预灰化时,金有重要作用。