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发帖数: 109 | 1 Sorry for being so late. These days I just was too busy.
When I was in China we seldom us Screen kits becau it is too expensive,
even we had these kits. Some people made these kits themselves. Now in
US these kits are so easy to get.
I usually try Hampton and Wizard kits first. sometimes good luck, but often
nothing.
First check sample purity and stability. it is important.
For precipitation, check it carefully. What kinds of precipitant it is.
sometimes precipitant is better than clear drops.
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