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Thank you. And thanks for the geometry primer. :)

Hello, I've seen where clear plastic tubing has been used to line 3-inch PVC pipe with good results. Can anyone point me to a source of these sleeves, and would you use a 4 " sleeve for a 3 " pipe? Thanks.

Thank you everyone. I went with the Matt Woodland Green from Wholesale Supplies Plus. It worked very well, just what I needed. No darkening needed.

Thank you both for the suggestions. I am giving the woodland green a try first. About black oxide, that is good to know. I wonder if charcoal would have the same effect if mixed with the green pigment. I have charcoal on hand but not black oxide.

Hello, I'm looking for a deep green pigment that will survive the saponification process and come out dark forest green. The one I tried, Eye Candy Dark Ocean Green, came out gray. Thanks!

Try rubber-banding a test tube to the side of the jar. Then you can just drop the pipette into the test tube and not have to deal with the bands.

I hope that didnt sound rude. what I mean to say is, saponification will not give a neutral soap directly. It will be slightly basic, maybe pH 8 or so at complete saponification. Then you would adjust the pH down with a bit of acid until you came to pH 7. the soap would still work at pH 7 based...

But you can get a pH 7 in soap. Just not directly. You need to titrate it down a bit after the saponification. Thats why I said it would be easier to do with a liquid soap because it doesn't solidify. You would need to dissolve the bar soap to a liquid before you could adjust the pH down. I...

Can you explain that with chemistry? At a pH of 7, the fatty acids will still be ionized. Its not until the pH drops to around 5 for most alkyl chain carboxylic acids that they become protonated. Unless Im missing something here, it should be possible to have a soap at pH 7 or even 6. I just...

I see now and understand the problem and terminology. It might be possible. I may try it for fun. Thank you!

Strictly speaking, pH 7.0 is neutral. Anything above or below is basic or acidic, respectively. Are we talking about bar soap or liquid soap? In theory one could produce a pH 7.0 bar soap directly, but this would require accurate stoichiometric measurements using purified oils. An easier way to...

Ok, here's my first post. Its probably better to say a neutral soap rather than a pH 7 soap. After all, what is a pH 7 soap? Is it pH 7.0? 7.1? 7.2? 6.8? 6.9? Which leads me to ask why it matters that much. But I'm new here, so what do I know? So long as it passes the taste test it's good for me.