You can actually buy plastisol in different formulations. I bought some that is "super soft". I also have some that is made for "saltwater" (which is extra stiff). The super soft stuff is GREAT! I bought it in a gallon container for $64 (+ free shipping). I know you can add softener, and I actually own some. The reason I use the pre-softened stuff is because of consistency with the rigidity (hopefully that makes since). No matter how much I choose to use when making some plastics, I always get the same consistency with the feel of the plastics. Larry is probably a MASTER of adding hardener and softener to get the feel he's looking for, but I'm not. This takes the guess work out of it for me. If I want a stiffer plastic, I just add in some of the saltwater stuff, stir, then cure. By doing this, it makes it very easy to figure out the rigidity of your final product. Pour up a plastic with just the super soft stuff. Then pour up a plastic with the saltwater. Feel the difference between the two. Then do a 50/50 lure. If you want it softer than the 50/50, but harder than the straight super soft plastisol, do 75% super soft, and 25% saltwater. I think you probably get the point by now. You can actually make yourself a little home made chart, with the different lures affixed to it and the mix ratios underneath. By doing that, you can simply push on the lure to know which mix ratio you want to use for your plastic project. This is what I do, and it's just my $.02.
Here is the super soft stuff I bought:
http://www.pouryourownworms.com/Super-S ... 8228SS.htmHere is the saltwater stuff:
http://www.pouryourownworms.com/Super-S ... 8228SS.htmTrust me, 2 gallons of this stuff will last a LOOOOOONG TIME!
Cheers.....